Please tag affected OS/ milestones, and add merge-request label

I think affected OS is every OS. Please correct me if it's wrong. Will leave the milestone to Tom.

This bug requires manual review: Less than 10 days to go before AppStore submit on M66
Please contact the milestone owner if you have questions.
Owners: cmasso@(Android), cmasso@(iOS), josafat@(ChromeOS), abdulsyed@(Desktop)

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/e5f13bd660bca233981eb4e17e5851cb4e15f6ab

commit e5f13bd660bca233981eb4e17e5851cb4e15f6ab
Author: Jingkui Wang <jkwang@google.com>
Date: Tue Apr 03 22:01:46 2018

High Precision Input for Nacl

Remove the code rounding nacl input event to integers.

BUG= chromium:828486 

Change-Id: Icd60c7c8e133e8bd0143712a779feb24059ac62d
Reviewed-on: https://chromium-review.googlesource.com/993152
Commit-Queue: Jingkui Wang <jkwang@google.com>
Reviewed-by: Dave Tapuska <dtapuska@chromium.org>
Cr-Commit-Position: refs/heads/master@{#547845}
[modify] https://crrev.com/e5f13bd660bca233981eb4e17e5851cb4e15f6ab/third_party/WebKit/Source/core/exported/WebPluginContainerImpl.cpp

Can you add the rationale regarding this merge? 

Right now, input points in web plugins (eg. NaCl) are rounded despite being stored in floats. Removing this rounding is critical to support low-latency inking in Google Keep, which is important to Chrome OS given that Keep is the default note-taking app and we have publicized our latency at events like the Pixelbook launch.

We only have one beta cycle left before M66 goes out to stable. Though the fix seems fairly small, What is your confidence level regarding the overall risk associated with merging this cl into M66?

I am quite confident the risk is low. As all of the stacks are already dealing with floats. This change only results in a different value. The only incompatibility it would cause is: someone explicitly checks if a float was actually rounded to an integer. I could not imagine anyone does this.

With that said, I am glad to learn if anyone else has other concerns.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/92616da07c7cbb5a3ff7c419ca3d94c187750428

commit 92616da07c7cbb5a3ff7c419ca3d94c187750428
Author: Jingkui Wang <jkwang@google.com>
Date: Fri Apr 06 15:14:56 2018

High Precision Input for Nacl

Remove the code rounding nacl input event to integers.

BUG= chromium:828486 

Change-Id: Icd60c7c8e133e8bd0143712a779feb24059ac62d
Reviewed-on: https://chromium-review.googlesource.com/993152
Commit-Queue: Jingkui Wang <jkwang@google.com>
Reviewed-by: Dave Tapuska <dtapuska@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#547845}(cherry picked from commit e5f13bd660bca233981eb4e17e5851cb4e15f6ab)
Reviewed-on: https://chromium-review.googlesource.com/998174
Cr-Commit-Position: refs/branch-heads/3359@{#604}
Cr-Branched-From: 66afc5e5d10127546cc4b98b9117aff588b5e66b-refs/heads/master@{#540276}
[modify] https://crrev.com/92616da07c7cbb5a3ff7c419ca3d94c187750428/third_party/WebKit/Source/core/exported/WebPluginContainerImpl.cpp

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/5134599de78ce2c5444afc0be5323e9f8658ade7

commit 5134599de78ce2c5444afc0be5323e9f8658ade7
Author: Jingkui Wang <jkwang@google.com>
Date: Fri Apr 06 22:52:11 2018

Revert "High Precision Input for Nacl"

This reverts commit 92616da07c7cbb5a3ff7c419ca3d94c187750428.

Reason for revert: Breaks official.android on 3359: crbug.com/830058

Original change's description:
> High Precision Input for Nacl
>
> Remove the code rounding nacl input event to integers.
>
> BUG= chromium:828486 
>
> Change-Id: Icd60c7c8e133e8bd0143712a779feb24059ac62d
> Reviewed-on: https://chromium-review.googlesource.com/993152
> Commit-Queue: Jingkui Wang <jkwang@google.com>
> Reviewed-by: Dave Tapuska <dtapuska@chromium.org>
> Cr-Original-Commit-Position: refs/heads/master@{#547845}(cherry picked from commit e5f13bd660bca233981eb4e17e5851cb4e15f6ab)
> Reviewed-on: https://chromium-review.googlesource.com/998174
> Cr-Commit-Position: refs/branch-heads/3359@{#604}
> Cr-Branched-From: 66afc5e5d10127546cc4b98b9117aff588b5e66b-refs/heads/master@{#540276}

TBR=dtapuska@chromium.org,jkwang@google.com

Change-Id: Iac30f222b8e9dd832032f18afd6e27a9716004a3
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug:  chromium:828486 
Reviewed-on: https://chromium-review.googlesource.com/1000592
Reviewed-by: Michael Giuffrida <michaelpg@chromium.org>
Cr-Commit-Position: refs/branch-heads/3359@{#608}
Cr-Branched-From: 66afc5e5d10127546cc4b98b9117aff588b5e66b-refs/heads/master@{#540276}
[modify] https://crrev.com/5134599de78ce2c5444afc0be5323e9f8658ade7/third_party/WebKit/Source/core/exported/WebPluginContainerImpl.cpp

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/3ae132bd4b9ef4e5733b8ef7fb53ca48dc1dc636

commit 3ae132bd4b9ef4e5733b8ef7fb53ca48dc1dc636
Author: Jingkui Wang <jkwang@google.com>
Date: Mon Apr 09 18:45:49 2018

High Precision Input for Nacl

Remove the code rounding nacl input event to integers.

BUG= chromium:828486 

Reviewed-on: https://chromium-review.googlesource.com/993152
Commit-Queue: Jingkui Wang <jkwang@google.com>
Reviewed-by: Dave Tapuska <dtapuska@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#547845}
Change-Id: Id44e8f24177389a366f9c1b649fa9274bdd2c388
Reviewed-on: https://chromium-review.googlesource.com/1000791
Cr-Commit-Position: refs/branch-heads/3359@{#626}
Cr-Branched-From: 66afc5e5d10127546cc4b98b9117aff588b5e66b-refs/heads/master@{#540276}
[modify] https://crrev.com/3ae132bd4b9ef4e5733b8ef7fb53ca48dc1dc636/third_party/WebKit/Source/core/exported/WebPluginContainerImpl.cpp
[modify] https://crrev.com/3ae132bd4b9ef4e5733b8ef7fb53ca48dc1dc636/third_party/WebKit/public/platform/WebPointerProperties.h