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Issue 775999 link

Starred by 31 users

Issue metadata

Status: Fixed
Owner:
Last visit > 30 days ago
Closed: Sep 19
Cc:
Components:
EstimatedDays: ----
NextAction: ----
OS: Linux , Windows , Chrome , Mac
Pri: 2
Type: Feature

Blocked on:
issue 844211

Blocking:
issue 881098



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Add support for N-up printing to Chrome

Project Member Reported by skau@chromium.org, Oct 18 2017

Issue description

Add N-up support to chrome by rerendering PDFs.  N-up is short for 2-up, 4-up, 8-up etc. where N pages of content are printing on a single sheet of paper.
 

Comment 1 by skau@chromium.org, Oct 18 2017

Cc: soushi@chromium.org pkakasi@chromium.org jayhlee@chromium.org
 Issue 775750  has been merged into this issue.
Components: Internals>Printing>CUPS
Project Member

Comment 3 by bugdroid1@chromium.org, Feb 9 2018

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/8b56f67bc9b537c118b7f57d09e7468a3ae1def1

commit 8b56f67bc9b537c118b7f57d09e7468a3ae1def1
Author: xlou <xlou@chromium.org>
Date: Fri Feb 09 23:34:30 2018

Adding a feature flag for the N-up printing feature.

This flag will be used for development / testing of the N-up
printing feature.  The plan is to have something available
for testing in M67 behind the flag, and to use the flag to
roll out changes when it is ready to launch.

Bug:  775999 

Change-Id: I2282ca057eb874c45068bde77259f82f5b10d5de
Reviewed-on: https://chromium-review.googlesource.com/910310
Commit-Queue: Shirleen Lou <xlou@chromium.org>
Reviewed-by: Sean Kau <skau@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
Cr-Commit-Position: refs/heads/master@{#535880}
[modify] https://crrev.com/8b56f67bc9b537c118b7f57d09e7468a3ae1def1/chrome/browser/about_flags.cc
[modify] https://crrev.com/8b56f67bc9b537c118b7f57d09e7468a3ae1def1/chrome/browser/flag_descriptions.cc
[modify] https://crrev.com/8b56f67bc9b537c118b7f57d09e7468a3ae1def1/chrome/browser/flag_descriptions.h
[modify] https://crrev.com/8b56f67bc9b537c118b7f57d09e7468a3ae1def1/chrome/common/chrome_features.cc
[modify] https://crrev.com/8b56f67bc9b537c118b7f57d09e7468a3ae1def1/chrome/common/chrome_features.h
[modify] https://crrev.com/8b56f67bc9b537c118b7f57d09e7468a3ae1def1/tools/metrics/histograms/enums.xml

Cc: msnoxell@chromium.org
Project Member

Comment 5 by bugdroid1@chromium.org, Apr 14 2018

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/a428812ba46a9b1add897e3034a287e6a4b43aee

commit a428812ba46a9b1add897e3034a287e6a4b43aee
Author: xlou <xlou@chromium.org>
Date: Sat Apr 14 00:03:33 2018

Add helper class printing::NupParameters.

The helper class will be used to check whether a N-up value is a
supported value or not, it will also be used to calculate N-up page
layout which includes how many pages on x axis, how many pages on
y axis, and the N-up page's orientation.

Bug:  775999 
Change-Id: I049a7bf87f3633939df076b809bba68941340bd8
Reviewed-on: https://chromium-review.googlesource.com/1013121
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Shirleen Lou <xlou@chromium.org>
Cr-Commit-Position: refs/heads/master@{#550819}
[modify] https://crrev.com/a428812ba46a9b1add897e3034a287e6a4b43aee/printing/BUILD.gn
[add] https://crrev.com/a428812ba46a9b1add897e3034a287e6a4b43aee/printing/nup_parameters.cc
[add] https://crrev.com/a428812ba46a9b1add897e3034a287e6a4b43aee/printing/nup_parameters.h
[add] https://crrev.com/a428812ba46a9b1add897e3034a287e6a4b43aee/printing/nup_parameters_unittest.cc

Project Member

Comment 6 by bugdroid1@chromium.org, Apr 17 2018

Labels: merge-merged-testbranch
The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/a428812ba46a9b1add897e3034a287e6a4b43aee

commit a428812ba46a9b1add897e3034a287e6a4b43aee
Author: xlou <xlou@chromium.org>
Date: Sat Apr 14 00:03:33 2018

Add helper class printing::NupParameters.

The helper class will be used to check whether a N-up value is a
supported value or not, it will also be used to calculate N-up page
layout which includes how many pages on x axis, how many pages on
y axis, and the N-up page's orientation.

Bug:  775999 
Change-Id: I049a7bf87f3633939df076b809bba68941340bd8
Reviewed-on: https://chromium-review.googlesource.com/1013121
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Shirleen Lou <xlou@chromium.org>
Cr-Commit-Position: refs/heads/master@{#550819}
[modify] https://crrev.com/a428812ba46a9b1add897e3034a287e6a4b43aee/printing/BUILD.gn
[add] https://crrev.com/a428812ba46a9b1add897e3034a287e6a4b43aee/printing/nup_parameters.cc
[add] https://crrev.com/a428812ba46a9b1add897e3034a287e6a4b43aee/printing/nup_parameters.h
[add] https://crrev.com/a428812ba46a9b1add897e3034a287e6a4b43aee/printing/nup_parameters_unittest.cc

Project Member

Comment 7 by bugdroid1@chromium.org, Apr 25 2018

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/008759aa5bc8cd05c5296908efbf74dcb043d66e

commit 008759aa5bc8cd05c5296908efbf74dcb043d66e
Author: xlou <xlou@chromium.org>
Date: Wed Apr 25 02:35:23 2018

Add N-up feature support to pdfium_engine.

In printing, 2-up, 3-up, or more generally N-up refers to a page
layout strategy in which multiple pages are composited onto a
single page.

1. Added ability to pass the N-up feature UI settings (which will be
   added in the next CL) to the print preview workflow, so that the
   PDF plugin can take action based on user's input.
2. Added N-up feature support to pdfium_engine, so that when the
   source is PDF, pdf plugin will generate the N-up output doc based
   on user's input.

Bug:  775999 
Change-Id: I27933d1a7da65376e70bdcb538393bb8bb3ec688
Reviewed-on: https://chromium-review.googlesource.com/1014628
Commit-Queue: Shirleen Lou <xlou@chromium.org>
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Reviewed-by: Jochen Eisinger <jochen@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
Reviewed-by: Sean Kau <skau@chromium.org>
Cr-Commit-Position: refs/heads/master@{#553428}
[modify] https://crrev.com/008759aa5bc8cd05c5296908efbf74dcb043d66e/components/printing/browser/print_manager_utils.cc
[modify] https://crrev.com/008759aa5bc8cd05c5296908efbf74dcb043d66e/components/printing/common/print_messages.cc
[modify] https://crrev.com/008759aa5bc8cd05c5296908efbf74dcb043d66e/components/printing/common/print_messages.h
[modify] https://crrev.com/008759aa5bc8cd05c5296908efbf74dcb043d66e/components/printing/renderer/print_render_frame_helper.cc
[modify] https://crrev.com/008759aa5bc8cd05c5296908efbf74dcb043d66e/content/renderer/pepper/pepper_plugin_instance_impl.cc
[modify] https://crrev.com/008759aa5bc8cd05c5296908efbf74dcb043d66e/pdf/pdfium/DEPS
[modify] https://crrev.com/008759aa5bc8cd05c5296908efbf74dcb043d66e/pdf/pdfium/pdfium_engine.cc
[modify] https://crrev.com/008759aa5bc8cd05c5296908efbf74dcb043d66e/pdf/pdfium/pdfium_engine.h
[modify] https://crrev.com/008759aa5bc8cd05c5296908efbf74dcb043d66e/ppapi/api/dev/pp_print_settings_dev.idl
[modify] https://crrev.com/008759aa5bc8cd05c5296908efbf74dcb043d66e/ppapi/c/dev/pp_print_settings_dev.h
[modify] https://crrev.com/008759aa5bc8cd05c5296908efbf74dcb043d66e/ppapi/proxy/ppapi_messages.h
[modify] https://crrev.com/008759aa5bc8cd05c5296908efbf74dcb043d66e/printing/print_settings.cc
[modify] https://crrev.com/008759aa5bc8cd05c5296908efbf74dcb043d66e/printing/print_settings.h
[modify] https://crrev.com/008759aa5bc8cd05c5296908efbf74dcb043d66e/printing/print_settings_conversion.cc
[modify] https://crrev.com/008759aa5bc8cd05c5296908efbf74dcb043d66e/third_party/blink/public/web/web_print_params.h

Project Member

Comment 8 by bugdroid1@chromium.org, Apr 25 2018

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/8a67bbaef837cbefb92a0954b2f671f1541f0a06

commit 8a67bbaef837cbefb92a0954b2f671f1541f0a06
Author: Henrik Boström <hbos@chromium.org>
Date: Wed Apr 25 10:55:16 2018

Revert "Add N-up feature support to pdfium_engine."

This reverts commit 008759aa5bc8cd05c5296908efbf74dcb043d66e.

Reason for revert: Breaks MSan Tests

Findit (https://goo.gl/kROfz5) confirmed this CL at revision 553428 as the culprit for
failures in the build cycles as shown on:
https://findit-for-me.appspot.com/waterfall/culprit?key=ag9zfmZpbmRpdC1mb3ItbWVyRAsSDVdmU3VzcGVjdGVkQ0wiMWNocm9taXVtLzAwODc1OWFhNWJjOGNkMDVjNTI5NjkwOGVmYmY3NGRjYjA0M2Q2NmUM

Example:
https://logs.chromium.org/v/?s=chromium%2Fbb%2Fchromium.memory%2FLinux_ChromiumOS_MSan_Tests%2F6869%2F%2B%2Frecipes%2Fsteps%2Fmus_browser_tests%2F0%2Flogs%2FOutOfProcessPPAPITest.Printing%2F0

Uninitialized bytes in __msan_check_mem_is_initialized at offset 0 inside [0x7f914c1f9524, 4)
==9854==WARNING: MemorySanitizer: use-of-uninitialized-value
    #0 0x12c35d8e in WriteBytesCommon ./../../base/pickle.cc:430:3
    #1 0x12c35d8e in void base::Pickle::WriteBytesStatic<4ul>(void const*) ./../../base/pickle.cc:395:0
    #2 0xb00ffa1 in WritePOD<int> ./../../base/pickle.h:327:5
    #3 0xb00ffa1 in WriteInt ./../../base/pickle.h:190:0
    #4 0xb00ffa1 in Write ./../../ipc/ipc_message_utils.h:186:0
    #5 0xb00ffa1 in WriteParam<unsigned int> ./../../ipc/ipc_message_utils.h:110:0
    #6 0xb00ffa1 in IPC::ParamTraits<PP_PrintSettings_Dev>::Write(base::Pickle*, PP_PrintSettings_Dev const&) ./../../ppapi/proxy/ppapi_messages.h:223:0
    #7 0xd1e82ee in MessageT<true, false> ./../../ipc/ipc_message_templates.h:124:33
...

 Uninitialized value was stored to memory at
    #0 0xb010122 in IPC::ParamTraits<PP_PrintSettings_Dev>::Write(base::Pickle*, PP_PrintSettings_Dev const&) ./../../ppapi/proxy/ppapi_messages.h:0:1
    #1 0xd1e82ee in MessageT<true, false> ./../../ipc/ipc_message_templates.h:124:33
    #2 0xd1e82ee in content::PepperPrintingHost::PrintSettingsCallback(ppapi::host::ReplyMessageContext, std::__1::pair<PP_PrintSettings_Dev, int>) ./../../content/browser/renderer_host/pepper/pepper_printing_host.cc:55:0
    #3 0xd1e87e2 in Invoke<const base::WeakPtr<content::PepperPrintingHost> &, const ppapi::host::ReplyMessageContext &, std::__1::pair<PP_PrintSettings_Dev, int> > ./../../base/bind_internal.h:447:12
    #4 0xd1e87e2 in MakeItSo<void (content::PepperPrintingHost::*const &)(ppapi::host::ReplyMessageContext, std::__1::pair<PP_PrintSettings_Dev, int>), const base::WeakPtr<content::PepperPrintingHost> &, const ppapi::host::ReplyMessageContext &, std::__1::pair<PP_PrintSettings_Dev, int> > ./../../base/bind_internal.h:550:0
    #5 0xd1e87e2 in RunImpl<void (content::PepperPrintingHost::*const &)(ppapi::host::ReplyMessageContext, std::__1::pair<PP_PrintSettings_Dev, int>), const std::__1::tuple<base::WeakPtr<content::PepperPrintingHost>, ppapi::host::ReplyMessageContext> &, 0, 1> ./../../base/bind_internal.h:604:0
    #6 0xd1e87e2 in base::internal::Invoker<base::internal::BindState<void (content::PepperPrintingHost::*)(ppapi::host::ReplyMessageContext, std::__1::pair<PP_PrintSettings_Dev, int>), base::WeakPtr<content::PepperPrintingHost>, ppapi::host::ReplyMessageContext>, void (std::__1::pair<PP_PrintSettings_Dev, int>)>::Run(base::internal::BindStateBase*, std::__1::pair<PP_PrintSettings_Dev, int>&&) ./../../base/bind_internal.h:586:0
    #7 0xd1e7292 in Run ./../../base/callback.h:96:12
...

Original change's description:
> Add N-up feature support to pdfium_engine.
> 
> In printing, 2-up, 3-up, or more generally N-up refers to a page
> layout strategy in which multiple pages are composited onto a
> single page.
> 
> 1. Added ability to pass the N-up feature UI settings (which will be
>    added in the next CL) to the print preview workflow, so that the
>    PDF plugin can take action based on user's input.
> 2. Added N-up feature support to pdfium_engine, so that when the
>    source is PDF, pdf plugin will generate the N-up output doc based
>    on user's input.
> 
> Bug:  775999 
> Change-Id: I27933d1a7da65376e70bdcb538393bb8bb3ec688
> Reviewed-on: https://chromium-review.googlesource.com/1014628
> Commit-Queue: Shirleen Lou <xlou@chromium.org>
> Reviewed-by: Daniel Cheng <dcheng@chromium.org>
> Reviewed-by: Jochen Eisinger <jochen@chromium.org>
> Reviewed-by: Lei Zhang <thestig@chromium.org>
> Reviewed-by: Sean Kau <skau@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#553428}

TBR=raymes@chromium.org,palmer@chromium.org,dcheng@chromium.org,thestig@chromium.org,skau@chromium.org,jochen@chromium.org,xlou@chromium.org

Change-Id: I017a6dd2527c843ebb365bf5ec2da19696860898
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug:  775999 
Reviewed-on: https://chromium-review.googlesource.com/1027770
Reviewed-by: Henrik Boström <hbos@chromium.org>
Commit-Queue: Henrik Boström <hbos@chromium.org>
Cr-Commit-Position: refs/heads/master@{#553507}
[modify] https://crrev.com/8a67bbaef837cbefb92a0954b2f671f1541f0a06/components/printing/browser/print_manager_utils.cc
[modify] https://crrev.com/8a67bbaef837cbefb92a0954b2f671f1541f0a06/components/printing/common/print_messages.cc
[modify] https://crrev.com/8a67bbaef837cbefb92a0954b2f671f1541f0a06/components/printing/common/print_messages.h
[modify] https://crrev.com/8a67bbaef837cbefb92a0954b2f671f1541f0a06/components/printing/renderer/print_render_frame_helper.cc
[modify] https://crrev.com/8a67bbaef837cbefb92a0954b2f671f1541f0a06/content/renderer/pepper/pepper_plugin_instance_impl.cc
[modify] https://crrev.com/8a67bbaef837cbefb92a0954b2f671f1541f0a06/pdf/pdfium/DEPS
[modify] https://crrev.com/8a67bbaef837cbefb92a0954b2f671f1541f0a06/pdf/pdfium/pdfium_engine.cc
[modify] https://crrev.com/8a67bbaef837cbefb92a0954b2f671f1541f0a06/pdf/pdfium/pdfium_engine.h
[modify] https://crrev.com/8a67bbaef837cbefb92a0954b2f671f1541f0a06/ppapi/api/dev/pp_print_settings_dev.idl
[modify] https://crrev.com/8a67bbaef837cbefb92a0954b2f671f1541f0a06/ppapi/c/dev/pp_print_settings_dev.h
[modify] https://crrev.com/8a67bbaef837cbefb92a0954b2f671f1541f0a06/ppapi/proxy/ppapi_messages.h
[modify] https://crrev.com/8a67bbaef837cbefb92a0954b2f671f1541f0a06/printing/print_settings.cc
[modify] https://crrev.com/8a67bbaef837cbefb92a0954b2f671f1541f0a06/printing/print_settings.h
[modify] https://crrev.com/8a67bbaef837cbefb92a0954b2f671f1541f0a06/printing/print_settings_conversion.cc
[modify] https://crrev.com/8a67bbaef837cbefb92a0954b2f671f1541f0a06/third_party/blink/public/web/web_print_params.h

Labels: M-68
Project Member

Comment 10 by bugdroid1@chromium.org, Apr 26 2018

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/19420756538dd841c1a1ee260a001f28e87ea13b

commit 19420756538dd841c1a1ee260a001f28e87ea13b
Author: xlou <xlou@chromium.org>
Date: Thu Apr 26 23:42:44 2018

Add N-up feature support to pdfium_engine.

In printing, 2-up, 3-up, or more generally N-up refers to a page
layout strategy in which multiple pages are composited onto a
single page.

1. Added ability to pass the N-up feature UI settings(which will be
   added in the next CL) to the print preview workflow, so that the
   PDF plugin can take action based on user's input.
2. Added N-up feature support to pdfium_engine, so that when the
   source is PDF, pdf plugin will generate the N-up output doc based
   on user's input.

These changes have been reviewed in:
https://chromium-review.googlesource.com/c/chromium/src/+/1014628.

Bug:  775999 
Change-Id: I552c9c91e32af0faa6ffaa8c42ac0652f470f791
Reviewed-on: https://chromium-review.googlesource.com/1028992
Reviewed-by: Lei Zhang <thestig@chromium.org>
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Reviewed-by: Jochen Eisinger <jochen@chromium.org>
Commit-Queue: Shirleen Lou <xlou@chromium.org>
Cr-Commit-Position: refs/heads/master@{#554188}
[modify] https://crrev.com/19420756538dd841c1a1ee260a001f28e87ea13b/components/printing/browser/print_manager_utils.cc
[modify] https://crrev.com/19420756538dd841c1a1ee260a001f28e87ea13b/components/printing/common/print_messages.cc
[modify] https://crrev.com/19420756538dd841c1a1ee260a001f28e87ea13b/components/printing/common/print_messages.h
[modify] https://crrev.com/19420756538dd841c1a1ee260a001f28e87ea13b/components/printing/renderer/print_render_frame_helper.cc
[modify] https://crrev.com/19420756538dd841c1a1ee260a001f28e87ea13b/content/browser/renderer_host/pepper/pepper_print_settings_manager.cc
[modify] https://crrev.com/19420756538dd841c1a1ee260a001f28e87ea13b/content/renderer/pepper/pepper_plugin_instance_impl.cc
[modify] https://crrev.com/19420756538dd841c1a1ee260a001f28e87ea13b/pdf/pdfium/DEPS
[modify] https://crrev.com/19420756538dd841c1a1ee260a001f28e87ea13b/pdf/pdfium/pdfium_engine.cc
[modify] https://crrev.com/19420756538dd841c1a1ee260a001f28e87ea13b/pdf/pdfium/pdfium_engine.h
[modify] https://crrev.com/19420756538dd841c1a1ee260a001f28e87ea13b/ppapi/api/dev/pp_print_settings_dev.idl
[modify] https://crrev.com/19420756538dd841c1a1ee260a001f28e87ea13b/ppapi/c/dev/pp_print_settings_dev.h
[modify] https://crrev.com/19420756538dd841c1a1ee260a001f28e87ea13b/ppapi/proxy/ppapi_messages.h
[modify] https://crrev.com/19420756538dd841c1a1ee260a001f28e87ea13b/printing/print_settings.cc
[modify] https://crrev.com/19420756538dd841c1a1ee260a001f28e87ea13b/printing/print_settings.h
[modify] https://crrev.com/19420756538dd841c1a1ee260a001f28e87ea13b/printing/print_settings_conversion.cc
[modify] https://crrev.com/19420756538dd841c1a1ee260a001f28e87ea13b/third_party/blink/public/web/web_print_params.h

Project Member

Comment 11 by bugdroid1@chromium.org, Apr 27 2018

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/4f2a1530f99e427f27b797b7ef27d527bed55ad1

commit 4f2a1530f99e427f27b797b7ef27d527bed55ad1
Author: xlou <xlou@chromium.org>
Date: Fri Apr 27 15:30:24 2018

Add unittest for PP_PrintSettings_Dev's new field.

A new field num_pages_per_sheet is added to PP_PrintSettings_Dev in
https://chromium-review.googlesource.com/c/chromium/src/+/1028992.
This CL modifies two existing tests to check the newly added field.

Bug:  775999 
Change-Id: I79f8cd9ef32e3319150fee7f90b3f7b2a7d7965d
Reviewed-on: https://chromium-review.googlesource.com/1030774
Reviewed-by: Lei Zhang <thestig@chromium.org>
Reviewed-by: Raymes Khoury <raymes@chromium.org>
Commit-Queue: Shirleen Lou <xlou@chromium.org>
Cr-Commit-Position: refs/heads/master@{#554392}
[modify] https://crrev.com/4f2a1530f99e427f27b797b7ef27d527bed55ad1/content/browser/renderer_host/pepper/pepper_printing_host_unittest.cc
[modify] https://crrev.com/4f2a1530f99e427f27b797b7ef27d527bed55ad1/ppapi/proxy/printing_resource_unittest.cc

Comment 12 by xlou@chromium.org, May 14 2018

Status: Started (was: Assigned)
Blockedon: 844211
Labels: -M-68 M-69
Project Member

Comment 15 by bugdroid1@chromium.org, May 22 2018

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/dc88867d7ec922480abb2db80dd694c0f87052d8

commit dc88867d7ec922480abb2db80dd694c0f87052d8
Author: Lei Zhang <thestig@chromium.org>
Date: Tue May 22 16:57:47 2018

Add a PrintBegin method to PPP_Pdf_1_1.

PPP_Printing_Dev_0_6 uses struct PP_PrintSettings_Dev in its Begin
method. r554188 changed the struct to add a new field, and another
pending CL wants to add one more field. These changes may not be safe
because Flash also uses PPP_Printing_Dev_0_6.

To resolve this issue, revert the PP_PrintSettings_Dev changes. In its
place, add a separate struct PP_PdfPrintSettings_Dev, and a separate
PrintBegin method to PPP_Pdf_1_1. When printing, if PPP_Pdf is
available, use its PrintBegin method. Otherwise, use PPP_Printing_Dev's
Begin method.

BUG= 775999 , 835654 

Change-Id: Ia489668c301e28eb943270fd1d7e268ede6300c5
Reviewed-on: https://chromium-review.googlesource.com/1065015
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Reviewed-by: Jochen Eisinger <jochen@chromium.org>
Reviewed-by: Raymes Khoury <raymes@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
Cr-Commit-Position: refs/heads/master@{#560658}
[modify] https://crrev.com/dc88867d7ec922480abb2db80dd694c0f87052d8/content/browser/renderer_host/pepper/pepper_print_settings_manager.cc
[modify] https://crrev.com/dc88867d7ec922480abb2db80dd694c0f87052d8/content/browser/renderer_host/pepper/pepper_printing_host_unittest.cc
[modify] https://crrev.com/dc88867d7ec922480abb2db80dd694c0f87052d8/content/renderer/pepper/pepper_plugin_instance_impl.cc
[modify] https://crrev.com/dc88867d7ec922480abb2db80dd694c0f87052d8/pdf/out_of_process_instance.cc
[modify] https://crrev.com/dc88867d7ec922480abb2db80dd694c0f87052d8/pdf/out_of_process_instance.h
[modify] https://crrev.com/dc88867d7ec922480abb2db80dd694c0f87052d8/pdf/pdf_engine.h
[modify] https://crrev.com/dc88867d7ec922480abb2db80dd694c0f87052d8/pdf/pdfium/pdfium_engine.cc
[modify] https://crrev.com/dc88867d7ec922480abb2db80dd694c0f87052d8/pdf/pdfium/pdfium_engine.h
[modify] https://crrev.com/dc88867d7ec922480abb2db80dd694c0f87052d8/pdf/pdfium/pdfium_print.cc
[modify] https://crrev.com/dc88867d7ec922480abb2db80dd694c0f87052d8/pdf/pdfium/pdfium_print.h
[modify] https://crrev.com/dc88867d7ec922480abb2db80dd694c0f87052d8/ppapi/api/dev/pp_print_settings_dev.idl
[modify] https://crrev.com/dc88867d7ec922480abb2db80dd694c0f87052d8/ppapi/c/dev/pp_print_settings_dev.h
[modify] https://crrev.com/dc88867d7ec922480abb2db80dd694c0f87052d8/ppapi/c/private/ppp_pdf.h
[modify] https://crrev.com/dc88867d7ec922480abb2db80dd694c0f87052d8/ppapi/proxy/ppapi_messages.h
[modify] https://crrev.com/dc88867d7ec922480abb2db80dd694c0f87052d8/ppapi/proxy/ppp_pdf_proxy.cc
[modify] https://crrev.com/dc88867d7ec922480abb2db80dd694c0f87052d8/ppapi/proxy/ppp_pdf_proxy.h
[modify] https://crrev.com/dc88867d7ec922480abb2db80dd694c0f87052d8/ppapi/proxy/ppp_printing_proxy.cc
[modify] https://crrev.com/dc88867d7ec922480abb2db80dd694c0f87052d8/ppapi/proxy/ppp_printing_proxy.h
[modify] https://crrev.com/dc88867d7ec922480abb2db80dd694c0f87052d8/ppapi/proxy/printing_resource_unittest.cc

Project Member

Comment 16 by bugdroid1@chromium.org, Jul 10

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/6bd7c2d1379fa7728539fb7858feab6ac904b80c

commit 6bd7c2d1379fa7728539fb7858feab6ac904b80c
Author: xlou <xlou@chromium.org>
Date: Tue Jul 10 01:35:40 2018

Change num_pages_per_sheet to pages_per_sheet.

Since the UI displays Pages Per Sheet for the N-up setting, and there
was a review comment previously to rename it to pages_per_sheet, so I
am renaming the variable name here.

In printing, 2-up, 3-up, or more generally N-up refers to a page
layout strategy in which multiple pages are composited onto a
single page.

Bug:  775999 
Change-Id: I538c22a450a603f6b0896a2c5c4273052ba9e969
Reviewed-on: https://chromium-review.googlesource.com/1128325
Reviewed-by: Lei Zhang <thestig@chromium.org>
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Reviewed-by: Sean Kau <skau@chromium.org>
Reviewed-by: Chris Palmer <palmer@chromium.org>
Reviewed-by: Raymes Khoury <raymes@chromium.org>
Commit-Queue: Shirleen Lou <xlou@chromium.org>
Cr-Commit-Position: refs/heads/master@{#573588}
[modify] https://crrev.com/6bd7c2d1379fa7728539fb7858feab6ac904b80c/chrome/browser/ui/webui/print_preview/print_preview_handler.cc
[modify] https://crrev.com/6bd7c2d1379fa7728539fb7858feab6ac904b80c/components/printing/browser/print_manager_utils.cc
[modify] https://crrev.com/6bd7c2d1379fa7728539fb7858feab6ac904b80c/components/printing/common/print_messages.cc
[modify] https://crrev.com/6bd7c2d1379fa7728539fb7858feab6ac904b80c/components/printing/common/print_messages.h
[modify] https://crrev.com/6bd7c2d1379fa7728539fb7858feab6ac904b80c/components/printing/renderer/print_render_frame_helper.cc
[modify] https://crrev.com/6bd7c2d1379fa7728539fb7858feab6ac904b80c/content/renderer/pepper/pepper_plugin_instance_impl.cc
[modify] https://crrev.com/6bd7c2d1379fa7728539fb7858feab6ac904b80c/pdf/pdfium/pdfium_print.cc
[modify] https://crrev.com/6bd7c2d1379fa7728539fb7858feab6ac904b80c/ppapi/c/private/ppp_pdf.h
[modify] https://crrev.com/6bd7c2d1379fa7728539fb7858feab6ac904b80c/ppapi/proxy/ppapi_messages.h
[modify] https://crrev.com/6bd7c2d1379fa7728539fb7858feab6ac904b80c/printing/print_settings.cc
[modify] https://crrev.com/6bd7c2d1379fa7728539fb7858feab6ac904b80c/printing/print_settings.h
[modify] https://crrev.com/6bd7c2d1379fa7728539fb7858feab6ac904b80c/printing/print_settings_conversion.cc
[modify] https://crrev.com/6bd7c2d1379fa7728539fb7858feab6ac904b80c/third_party/blink/public/web/web_print_params.h

Project Member

Comment 17 by bugdroid1@chromium.org, Jul 13

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/8252cb8bcfe0ad40212b91520c43fbd11288f00a

commit 8252cb8bcfe0ad40212b91520c43fbd11288f00a
Author: xlou <xlou@chromium.org>
Date: Fri Jul 13 00:32:58 2018

Change num_pages_per_sheet to pages_per_sheet.

Missed some in CL: crrev.com/c/1128325.

Since the UI displays Pages Per Sheet for the N-up setting, and there
was a review comment previously to rename it to pages_per_sheet, so I
am renaming the variable name here.

In printing, 2-up, 3-up, or more generally N-up refers to a page
layout strategy in which multiple pages are composited onto a
single page.

Bug:  775999 
Change-Id: Ie605699d64a3ad1fcf2f943378e08065048183e5
Reviewed-on: https://chromium-review.googlesource.com/1135895
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Shirleen Lou <xlou@chromium.org>
Cr-Commit-Position: refs/heads/master@{#574791}
[modify] https://crrev.com/8252cb8bcfe0ad40212b91520c43fbd11288f00a/pdf/pdfium/pdfium_print.h
[modify] https://crrev.com/8252cb8bcfe0ad40212b91520c43fbd11288f00a/printing/nup_parameters.cc
[modify] https://crrev.com/8252cb8bcfe0ad40212b91520c43fbd11288f00a/printing/nup_parameters.h

Project Member

Comment 18 by bugdroid1@chromium.org, Jul 21

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/71c45c897540ce9153b1c3e63b308e658cbc61d5

commit 71c45c897540ce9153b1c3e63b308e658cbc61d5
Author: xlou <xlou@chromium.org>
Date: Sat Jul 21 01:19:17 2018

Expose pdfium functionality for N-up mojo service.

Added two new functions to expose pdfium functionality to the
to-be-created N-up conversion mojo service.

ConvertPdfPagesToNupPdf will take multiple PDF pages and import them
into a N-up PDF.

ConvertPdfDocumentToNupPdf will take an entire PDF document and convert
it to a N-up PDF document.

In printing, 2-up, 3-up, or more generally N-up refers to a page
layout strategy in which multiple pages are composited onto a
single page.

Bug:  775999 
Change-Id: I11edc90ee717fcb295a35e3784f4ed4e72ae8117
Reviewed-on: https://chromium-review.googlesource.com/1134484
Commit-Queue: Shirleen Lou <xlou@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
Cr-Commit-Position: refs/heads/master@{#577052}
[modify] https://crrev.com/71c45c897540ce9153b1c3e63b308e658cbc61d5/pdf/pdf.cc
[modify] https://crrev.com/71c45c897540ce9153b1c3e63b308e658cbc61d5/pdf/pdf.h
[modify] https://crrev.com/71c45c897540ce9153b1c3e63b308e658cbc61d5/pdf/pdf_engine.h
[modify] https://crrev.com/71c45c897540ce9153b1c3e63b308e658cbc61d5/pdf/pdfium/pdfium_engine_exports.cc
[modify] https://crrev.com/71c45c897540ce9153b1c3e63b308e658cbc61d5/pdf/pdfium/pdfium_engine_exports.h
[modify] https://crrev.com/71c45c897540ce9153b1c3e63b308e658cbc61d5/pdf/pdfium/pdfium_engine_exports_unittest.cc
[modify] https://crrev.com/71c45c897540ce9153b1c3e63b308e658cbc61d5/pdf/pdfium/pdfium_print.cc
[modify] https://crrev.com/71c45c897540ce9153b1c3e63b308e658cbc61d5/pdf/pdfium/pdfium_print.h
[add] https://crrev.com/71c45c897540ce9153b1c3e63b308e658cbc61d5/pdf/test/data/rectangles.pdf
[add] https://crrev.com/71c45c897540ce9153b1c3e63b308e658cbc61d5/pdf/test/data/rectangles_multi_pages.pdf

Labels: Hotlist-ConOps-CrOS
Project Member

Comment 20 by bugdroid1@chromium.org, Jul 26

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/63b093741c532a2330f09dbc02bd3e64f1f8f044

commit 63b093741c532a2330f09dbc02bd3e64f1f8f044
Author: xlou <xlou@chromium.org>
Date: Thu Jul 26 17:12:33 2018

Add pagesPerSheet to the resetPrintPreviewMode JS message.

When N-up feature is enabled, we need to pass the pagesPerSheet
value to the pdf plugin, so that it can compute the number of
Nup pages and append appropriate number of blank pages.

In printing, 2-up, 3-up, or more generally N-up refers to a page
layout strategy in which multiple pages are composited onto a
single page.

Bug:  775999 
Change-Id: Id8efc03c997ed7e2c643ec53f80747c2efa4719b
Reviewed-on: https://chromium-review.googlesource.com/1148989
Commit-Queue: Shirleen Lou <xlou@chromium.org>
Reviewed-by: Rebekah Potter <rbpotter@chromium.org>
Cr-Commit-Position: refs/heads/master@{#578345}
[modify] https://crrev.com/63b093741c532a2330f09dbc02bd3e64f1f8f044/chrome/browser/resources/print_preview/new/preview_area.js

Project Member

Comment 21 by bugdroid1@chromium.org, Jul 31

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/e4d2853f126b1ba2dcb4f693af611c0ccea3c4fe

commit e4d2853f126b1ba2dcb4f693af611c0ccea3c4fe
Author: xlou <xlou@chromium.org>
Date: Tue Jul 31 22:03:34 2018

Print Preview: Set page index as pageIndex when pagesPerSheet > 1.

When sending URLs to the PDF plugin, the page index in the URL
needs to be the page index for the displayed PDF document.
When N-up > 1, this will not match the page index from the selected
pages in the UI, since the N-up page numbers will be recalculated
using the number of pages selected and pagesPerSheet Value.  The
new number of pages will be ceil(#pages selected/pagesPerSheet),
and the index of the N-up pages will start from 0.  Hence changing
the function onPagePreviewReady_ to use the N-upped document index
when pagesPerSheet > 1.

In printing, 2-up, 3-up, or more generally N-up refers to a page
layout strategy in which multiple pages are composited onto a
single page.

Bug:  775999 
Change-Id: I1488431713815b573eb2798e23b011417b9fa46d
Reviewed-on: https://chromium-review.googlesource.com/1155906
Commit-Queue: Shirleen Lou <xlou@chromium.org>
Reviewed-by: Rebekah Potter <rbpotter@chromium.org>
Cr-Commit-Position: refs/heads/master@{#579588}
[modify] https://crrev.com/e4d2853f126b1ba2dcb4f693af611c0ccea3c4fe/chrome/browser/resources/print_preview/new/preview_area.js

Project Member

Comment 22 by bugdroid1@chromium.org, Aug 22

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/8c7a329b221cd9b2ddb12c62500042340bb8ba26

commit 8c7a329b221cd9b2ddb12c62500042340bb8ba26
Author: xlou <xlou@chromium.org>
Date: Wed Aug 22 16:55:50 2018

Added an interface to the printing Mojo service for N-up conversion.

Added an interface to the existing printing Mojo service for pdf N-up
Conversion for web content.  The service has two main functions:
NupPageConvert(): Convert N PDF pages to a N-up PDF.
NupDocumentConvert(): Convert a PDF document to a N-up PDF document.

In printing, 2-up, 3-up, or more generally N-up refers to a page
layout strategy in which multiple pages are composited onto a
single page.

Bug:  775999 
Change-Id: I7c3b78a6d7b2fdaaa3d67e456b6b3b624480897e
Reviewed-on: https://chromium-review.googlesource.com/1172100
Commit-Queue: Shirleen Lou <xlou@chromium.org>
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
Cr-Commit-Position: refs/heads/master@{#585097}
[modify] https://crrev.com/8c7a329b221cd9b2ddb12c62500042340bb8ba26/chrome/browser/BUILD.gn
[add] https://crrev.com/8c7a329b221cd9b2ddb12c62500042340bb8ba26/chrome/browser/printing/pdf_nup_converter_client.cc
[add] https://crrev.com/8c7a329b221cd9b2ddb12c62500042340bb8ba26/chrome/browser/printing/pdf_nup_converter_client.h
[modify] https://crrev.com/8c7a329b221cd9b2ddb12c62500042340bb8ba26/chrome/services/printing/BUILD.gn
[modify] https://crrev.com/8c7a329b221cd9b2ddb12c62500042340bb8ba26/chrome/services/printing/DEPS
[modify] https://crrev.com/8c7a329b221cd9b2ddb12c62500042340bb8ba26/chrome/services/printing/manifest.json
[add] https://crrev.com/8c7a329b221cd9b2ddb12c62500042340bb8ba26/chrome/services/printing/pdf_nup_converter.cc
[add] https://crrev.com/8c7a329b221cd9b2ddb12c62500042340bb8ba26/chrome/services/printing/pdf_nup_converter.h
[modify] https://crrev.com/8c7a329b221cd9b2ddb12c62500042340bb8ba26/chrome/services/printing/printing_service.cc
[modify] https://crrev.com/8c7a329b221cd9b2ddb12c62500042340bb8ba26/chrome/services/printing/public/mojom/BUILD.gn
[add] https://crrev.com/8c7a329b221cd9b2ddb12c62500042340bb8ba26/chrome/services/printing/public/mojom/pdf_nup_converter.mojom

Project Member

Comment 23 by bugdroid1@chromium.org, Sep 3

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/11aa99e0d5028ef16815ebf65ec819985db6cee5

commit 11aa99e0d5028ef16815ebf65ec819985db6cee5
Author: xlou <xlou@chromium.org>
Date: Mon Sep 03 01:03:35 2018

PrintPreview: Add N-up support to the printing pipeline.

Added callback handling when pagesPerSheet > 1.
Added more fields to print messages to support N-up printing.

In printing, 2-up, 3-up, or more generally N-up refers to a page
layout strategy in which multiple pages are composited onto a
single page.

Bug:  775999 
Change-Id: Ic24fef1b49f21dd35fcbc334736b62128e7edd98
Reviewed-on: https://chromium-review.googlesource.com/1182615
Commit-Queue: Shirleen Lou <xlou@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
Cr-Commit-Position: refs/heads/master@{#588306}
[modify] https://crrev.com/11aa99e0d5028ef16815ebf65ec819985db6cee5/chrome/browser/printing/print_preview_message_handler.cc
[modify] https://crrev.com/11aa99e0d5028ef16815ebf65ec819985db6cee5/chrome/browser/printing/print_preview_message_handler.h
[modify] https://crrev.com/11aa99e0d5028ef16815ebf65ec819985db6cee5/chrome/browser/printing/printing_init.cc
[modify] https://crrev.com/11aa99e0d5028ef16815ebf65ec819985db6cee5/chrome/browser/ui/webui/print_preview/print_preview_ui.cc
[modify] https://crrev.com/11aa99e0d5028ef16815ebf65ec819985db6cee5/chrome/browser/ui/webui/print_preview/print_preview_ui.h
[modify] https://crrev.com/11aa99e0d5028ef16815ebf65ec819985db6cee5/components/printing/common/print_messages.h
[modify] https://crrev.com/11aa99e0d5028ef16815ebf65ec819985db6cee5/components/printing/renderer/print_render_frame_helper.cc

Project Member

Comment 24 by bugdroid1@chromium.org, Sep 3

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/23ed99cddc26f0a6aca9bfc9189108f96dd811a9

commit 23ed99cddc26f0a6aca9bfc9189108f96dd811a9
Author: xlou <xlou@chromium.org>
Date: Mon Sep 03 01:22:38 2018

PrintPreview: Disable margins when pagesPerSheet > 1.

For initial release, set margins to default value and disable
the margins button when pagesPerSheet > 1.

Put the pagesPerSheet settings section on top of the Margins
settings section, in order to make it easier to understand
that margins are disabled because of pages per sheet > 1.

In printing, 2-up, 3-up, or more generally N-up refers to a page
layout strategy in which multiple pages are composited onto a
single page.

Bug:  775999 
Change-Id: I76aa4336507b17e41d6d4a42d5cfc7d35c5ea85e
Reviewed-on: https://chromium-review.googlesource.com/1186115
Commit-Queue: Shirleen Lou <xlou@chromium.org>
Reviewed-by: Rebekah Potter <rbpotter@chromium.org>
Cr-Commit-Position: refs/heads/master@{#588310}
[modify] https://crrev.com/23ed99cddc26f0a6aca9bfc9189108f96dd811a9/chrome/browser/resources/print_preview/new/app.html
[modify] https://crrev.com/23ed99cddc26f0a6aca9bfc9189108f96dd811a9/chrome/browser/resources/print_preview/new/margins_settings.html
[modify] https://crrev.com/23ed99cddc26f0a6aca9bfc9189108f96dd811a9/chrome/browser/resources/print_preview/new/margins_settings.js
[modify] https://crrev.com/23ed99cddc26f0a6aca9bfc9189108f96dd811a9/chrome/browser/resources/print_preview/new/preview_area.js
[modify] https://crrev.com/23ed99cddc26f0a6aca9bfc9189108f96dd811a9/chrome/test/data/webui/print_preview/new_print_preview_ui_browsertest.js
[modify] https://crrev.com/23ed99cddc26f0a6aca9bfc9189108f96dd811a9/chrome/test/data/webui/print_preview/preview_generation_test.js
[modify] https://crrev.com/23ed99cddc26f0a6aca9bfc9189108f96dd811a9/chrome/test/data/webui/print_preview/settings_section_test.js

Blocking: 881098
Labels: -M-69 M-71
Project Member

Comment 27 by bugdroid1@chromium.org, Sep 13

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/ad22caf14833319d12a250629f1ec5f401648477

commit ad22caf14833319d12a250629f1ec5f401648477
Author: xlou <xlou@chromium.org>
Date: Thu Sep 13 22:09:34 2018

Print Preview: Fit into printable area after N-up conversion.

Currently N-up conversion uses physical page size to fit N pages
onto one sheet.  So we need to fit the N-upped document into
printable area before sending to the UI or a printer.

In printing, 2-up, 3-up, or more generally N-up refers to a page
layout strategy in which multiple pages are composited onto a
single page.

Bug:  775999 
Change-Id: Ie5a80aa89979fecb08b9acc16c2aae47b7ce914e
Reviewed-on: https://chromium-review.googlesource.com/1204854
Commit-Queue: Shirleen Lou <xlou@chromium.org>
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
Cr-Commit-Position: refs/heads/master@{#591179}
[modify] https://crrev.com/ad22caf14833319d12a250629f1ec5f401648477/chrome/browser/printing/pdf_nup_converter_client.cc
[modify] https://crrev.com/ad22caf14833319d12a250629f1ec5f401648477/chrome/browser/printing/pdf_nup_converter_client.h
[modify] https://crrev.com/ad22caf14833319d12a250629f1ec5f401648477/chrome/browser/printing/print_preview_message_handler.cc
[modify] https://crrev.com/ad22caf14833319d12a250629f1ec5f401648477/chrome/browser/printing/print_preview_message_handler.h
[add] https://crrev.com/ad22caf14833319d12a250629f1ec5f401648477/chrome/browser/printing/print_preview_message_handler_unittest.cc
[modify] https://crrev.com/ad22caf14833319d12a250629f1ec5f401648477/chrome/browser/ui/webui/print_preview/print_preview_ui.cc
[modify] https://crrev.com/ad22caf14833319d12a250629f1ec5f401648477/chrome/browser/ui/webui/print_preview/print_preview_ui.h
[modify] https://crrev.com/ad22caf14833319d12a250629f1ec5f401648477/chrome/services/printing/pdf_nup_converter.cc
[modify] https://crrev.com/ad22caf14833319d12a250629f1ec5f401648477/chrome/services/printing/pdf_nup_converter.h
[modify] https://crrev.com/ad22caf14833319d12a250629f1ec5f401648477/chrome/services/printing/public/mojom/pdf_nup_converter.mojom
[modify] https://crrev.com/ad22caf14833319d12a250629f1ec5f401648477/chrome/test/BUILD.gn
[modify] https://crrev.com/ad22caf14833319d12a250629f1ec5f401648477/pdf/pdf.cc
[modify] https://crrev.com/ad22caf14833319d12a250629f1ec5f401648477/pdf/pdf.h
[modify] https://crrev.com/ad22caf14833319d12a250629f1ec5f401648477/pdf/pdf_engine.h
[modify] https://crrev.com/ad22caf14833319d12a250629f1ec5f401648477/pdf/pdfium/pdfium_engine_exports.cc
[modify] https://crrev.com/ad22caf14833319d12a250629f1ec5f401648477/pdf/pdfium/pdfium_engine_exports.h
[modify] https://crrev.com/ad22caf14833319d12a250629f1ec5f401648477/pdf/pdfium/pdfium_engine_exports_unittest.cc
[modify] https://crrev.com/ad22caf14833319d12a250629f1ec5f401648477/pdf/pdfium/pdfium_print.cc
[modify] https://crrev.com/ad22caf14833319d12a250629f1ec5f401648477/pdf/pdfium/pdfium_print.h

Status: Fixed (was: Started)
Cc: xlou@chromium.org
 Issue 144222  has been merged into this issue.
Status: Started (was: Fixed)
To make finch configuration happy.
Status: Fixed (was: Started)
Project Member

Comment 32 by bugdroid1@chromium.org, Oct 9

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/497f5ffe53417411f0e7a7a79dcb87eb13a578a2

commit 497f5ffe53417411f0e7a7a79dcb87eb13a578a2
Author: xlou <xlou@chromium.org>
Date: Tue Oct 09 16:38:40 2018

Field trial config for NupPrinting.

A couple of finch experiment reports show that the featutre doesn't
impact any metrics that is monitored.  Hence move onto the next
step of finch experiment.

Bug:  775999 
Change-Id: I5f7e9328f3878081a622250d1e2790ba5e1a9926
Reviewed-on: https://chromium-review.googlesource.com/c/1269184
Reviewed-by: Robert Kaplow (sloooow) <rkaplow@chromium.org>
Commit-Queue: Shirleen Lou <xlou@chromium.org>
Cr-Commit-Position: refs/heads/master@{#597947}
[modify] https://crrev.com/497f5ffe53417411f0e7a7a79dcb87eb13a578a2/testing/variations/fieldtrial_testing_config.json

Project Member

Comment 33 by bugdroid1@chromium.org, Oct 17

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/62f2f8f209a82db0dd5a311eb4f844bddb75c98e

commit 62f2f8f209a82db0dd5a311eb4f844bddb75c98e
Author: xlou <xlou@chromium.org>
Date: Wed Oct 17 01:11:42 2018

Print Preview N-up printing: Enable by default on ToT

In printing, 2-up, 3-up, or more generally N-up refers to a page
layout strategy in which multiple pages are composited onto a
single page.

Bug:  775999 
Change-Id: I60295e1e142c1f7ef500d4031684b361af5b9e90
Reviewed-on: https://chromium-review.googlesource.com/c/1274454
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Shirleen Lou <xlou@chromium.org>
Cr-Commit-Position: refs/heads/master@{#600223}
[modify] https://crrev.com/62f2f8f209a82db0dd5a311eb4f844bddb75c98e/chrome/common/chrome_features.cc

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