Note issue is not seen on Mac OS.

Something that is Windows 7 only is presumably somewhere in the GPU process. We do not have any custom Blink code for Windows 7.

Narrow Bisect info : 
https://chromium.googlesource.com/chromium/src/+log/b0ec883fdeea4c3b2b13900650c744d22e0b0f22..f41443c03b03d8e2d83314ae4690f402beada8b4?pretty=fuller&n=100

Skia URL : 
https://skia.googlesource.com/skia.git/+log/05814de6ba50..6410d29e1173?pretty=fuller&n=100

Suspecting: 6410d29e1173b49b7319d7389db7c533e27bb3d2 from Skia URL

@robertphillips : Could you please help to reassign if your change is not the cause for this change.

Adding RB Label as this is a recent Regression. Please feel free to remove if not required.
Thank You.

I cannot reproduce the bug at all on my Win7 laptop both on a local build and in the bisect between 60.0.3094.0 and 60.0.3095.0.

Could you, the OP, please post the gpu information for the machine you were seeing this on? You should be able to copy & paste the information from chrome://gpu.

rpise@, can you please update chrome://gpu info as per c#7?

Thank you!

With response to comment #7 :
Kindly refer the attached screenshot of chrome://gpu information.

Narrow Bisect info : 
https://chromium.googlesource.com/chromium/src/+log/b0ec883fdeea4c3b2b13900650c744d22e0b0f22..f41443c03b03d8e2d83314ae4690f402beada8b4?pretty=fuller&n=100

Suspecting: r470318 from Narrow bisect

@cjgrant : Could you please help to reassign if your change is not the cause for this change.

Deleted: Chrome_gpu_win_7_canary.png 673 KB

	Chrome_gpu_win_7_canary.png 673 KB View Download

@rpise@, sorry, but r470318 could not be the cause of this regression - it's local to VR-specific code.  Punting back.

I was finally able to reproduce the bug locally by passing "--use-angle=d3d9" on startup.

I will keep looking into the issue but it would be good to get some ANGLE expertise involved.

What appears to be going on is that the creation of Alpha_8 renderable surfaces is failing with ANGLE.

I wonder if this could be reproduced in dm by running with our angle_d3d9_es2 config

Just to update M-60 will be branched in 3 days time and would be good to have this fixed before M-60 is branched.

Cc'ing 	geofflang@ as well for inputs as per C#11.

I have a Skia fix brewing here: https://skia-review.googlesource.com/c/17387/ (Add fixes & test for isConfigTexturable and isConfigRenderable).

It is just stuck (Skia-side) on the NexusPlayer Vulkan config.

The following revision refers to this bug:
  https://skia.googlesource.com/skia/+/b7b7e5fba08399c76fa0763ec3ed49ae120b64d8

commit b7b7e5fba08399c76fa0763ec3ed49ae120b64d8
Author: Robert Phillips <robertphillips@google.com>
Date: Mon May 22 17:55:48 2017

Add fixes & test for isConfigTexturable and isConfigRenderable

This CL fixes:
  isConfigTexturable was returning true for:
            kRG_float for ANGLE ES2 configs
  isConfigRenderable was returning true for:
            kAlpha_8 for ANGLE ES2 configs
  isConfigTexturable and isConfigRenderable were returning true for:
            SBGRA on ES2
  The NexusPlayer was marking RGBA & RG float configs as renderable but not textureable

Bug:  720325 

Change-Id: If21361870dbdde8f3e09bc9dff3a394f2a329157
Reviewed-on: https://skia-review.googlesource.com/17387
Commit-Queue: Robert Phillips <robertphillips@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>

[modify] https://crrev.com/b7b7e5fba08399c76fa0763ec3ed49ae120b64d8/src/gpu/GrGpu.cpp
[modify] https://crrev.com/b7b7e5fba08399c76fa0763ec3ed49ae120b64d8/tests/GrSurfaceTest.cpp
[modify] https://crrev.com/b7b7e5fba08399c76fa0763ec3ed49ae120b64d8/src/gpu/gl/GrGLCaps.cpp
[modify] https://crrev.com/b7b7e5fba08399c76fa0763ec3ed49ae120b64d8/tools/gpu/GrTest.cpp
[modify] https://crrev.com/b7b7e5fba08399c76fa0763ec3ed49ae120b64d8/include/gpu/GrCaps.h
[modify] https://crrev.com/b7b7e5fba08399c76fa0763ec3ed49ae120b64d8/tests/IntTextureTest.cpp
[modify] https://crrev.com/b7b7e5fba08399c76fa0763ec3ed49ae120b64d8/src/gpu/vk/GrVkCaps.cpp

The Skia CL https://skia-review.googlesource.com/c/17387/ (Add fixes & test for isConfigTexturable and isConfigRenderable) rolled into Chrome at 473665 in https://chromium-review.googlesource.com/c/510744/.

This made it into the 60.0.3108.0 Canary.

I do not seem to be able to reproduce it locally with the 60.0.3108.0 Canary and "--use-angle=d3d9" on my Windows 7 machine.

OP would you be willing to verify on your machine? 

I am also no longer able to repro on my local build.

I'm marking this as 'fixed' until told different.

With response to comment #20 :
Rechecked the above issue on Windows 7 OS with latest canary chrome version : 61.0.3114.0 and the issue is still reproducible.Kindly refer the attached screen cast for reference.

Deleted: Actual_video_canary.mp4 2.2 MB

	Actual_video_canary.mp4 2.2 MB View Download

This issue is tagged as Release Block Beta. M60 will be promoted to Beta on June 8. So please have a fix ASAP.

The following revision refers to this bug:
  https://skia.googlesource.com/skia/+/8bf1f9ffcf4b0168a1a05399eb0ed4e5e04eab80

commit 8bf1f9ffcf4b0168a1a05399eb0ed4e5e04eab80
Author: Robert Phillips <robertphillips@google.com>
Date: Wed May 31 23:12:39 2017

Disable deferred proxies for M60 branch

Bug:  720325 
Change-Id: I0529bbcd592bdc5d5a741731af8a66971e485649
Reviewed-on: https://skia-review.googlesource.com/18239
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>

[modify] https://crrev.com/8bf1f9ffcf4b0168a1a05399eb0ed4e5e04eab80/tests/DetermineDomainModeTest.cpp
[modify] https://crrev.com/8bf1f9ffcf4b0168a1a05399eb0ed4e5e04eab80/src/gpu/GrSurfaceProxy.cpp
[modify] https://crrev.com/8bf1f9ffcf4b0168a1a05399eb0ed4e5e04eab80/tests/ProxyTest.cpp
[modify] https://crrev.com/8bf1f9ffcf4b0168a1a05399eb0ed4e5e04eab80/include/private/GrSurfaceProxy.h
[modify] https://crrev.com/8bf1f9ffcf4b0168a1a05399eb0ed4e5e04eab80/tests/ProxyRefTest.cpp

The following revision refers to this bug:
  https://skia.googlesource.com/skia/+/bc712740bda0b78ba909894eed7aa6feeb9efe34

commit bc712740bda0b78ba909894eed7aa6feeb9efe34
Author: Robert Phillips <robertphillips@google.com>
Date: Fri Jun 02 16:51:49 2017

Disable single channel renderability for ANGLE ES2

Bug:  720325 

Change-Id: Ib55c7a0c59a23b8dc012e04b626010de7da2921b
Reviewed-on: https://skia-review.googlesource.com/18485
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>

[modify] https://crrev.com/bc712740bda0b78ba909894eed7aa6feeb9efe34/src/gpu/gl/GrGLUtil.cpp
[modify] https://crrev.com/bc712740bda0b78ba909894eed7aa6feeb9efe34/src/gpu/gl/GrGLUtil.h
[modify] https://crrev.com/bc712740bda0b78ba909894eed7aa6feeb9efe34/src/gpu/gl/GrGLCaps.cpp

Thanks Robert for the quick turnaround.

rpise@ Please verify in the canary once the CL is picked up.

https://skia-review.googlesource.com/c/18239/ (Disable deferred proxies for M60 branch) rolled into Chrome on 6/1/2017 in https://chromium-review.googlesource.com/c/520713/ at 476287.

This made it into the 61.0.3118.0 Canary.

The following revision refers to this bug:
  https://chromium.googlesource.com/angle/angle/+/8d4db1fa5fa743eb931be3b257142f5ccb0ed9e9

commit 8d4db1fa5fa743eb931be3b257142f5ccb0ed9e9
Author: Geoff Lang <geofflang@chromium.org>
Date: Fri Jun 02 19:47:37 2017

Fix format info for unsized RG texture formats.

The unsized GL_RED and GL_RG formats are only usable with the
EXT_texture_rg extension and are always renderable.

BUG= 720325 

Change-Id: I813662f6c90f1a6a640be747ae40b81727e58cdc
Reviewed-on: https://chromium-review.googlesource.com/523023
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Geoff Lang <geofflang@chromium.org>

[modify] https://crrev.com/8d4db1fa5fa743eb931be3b257142f5ccb0ed9e9/src/libANGLE/formatutils.cpp

The Skia-fix in question (https://skia-review.googlesource.com/c/18239/ (Disable deferred proxies for M60 branch)) has been in Chrome for 4 days.

I would like to cherry pick it back to M60. Although the ANGLE-fix (https://chromium-review.googlesource.com/523023 (Fix format info for unsized RG texture formats)) will also probably fix the bug (and is cleaner), the Skia-side fix is a surer bet.

With response to comment #27 : Rechecked the above issue on Windows 7 OS with latest canary chrome version : 61.0.3119.0 and the issue is not reproduced.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/c3dd368e8a690ec92564583b0b008d8541043d3f

commit c3dd368e8a690ec92564583b0b008d8541043d3f
Author: jmadill <jmadill@chromium.org>
Date: Mon Jun 05 16:17:42 2017

Roll ANGLE b7d5e30..5978e28

https://chromium.googlesource.com/angle/angle.git/+log/b7d5e30..5978e28

BUG= 720325 

TBR=geofflang@chromium.org

TEST=bots

CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.win:win_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.android:android_optional_gpu_tests_rel

Review-Url: https://codereview.chromium.org/2917413002
Cr-Commit-Position: refs/heads/master@{#476993}

[modify] https://crrev.com/c3dd368e8a690ec92564583b0b008d8541043d3f/DEPS

I think the ANGLE-side fix is is very safe because the validation only becomes more lenient and skia would continue to follow the same code paths instead of using different formats.

This bug requires manual review: DEPS changes referenced in bugdroid comments.
Please contact the milestone owner if you have questions.
Owners: amineer@(Android), cmasso@(iOS), josafat@(ChromeOS), bustamante@(Desktop)

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

rpise@ Please verify in latest canary. 

Robert, feel free to merge if looks good and once merge is approved.

With response to comment #35 : Rechecked the above issue on Windows 7 OS with latest canary chrome version : 61.0.3122.0 and the issue is not reproduced.

Approving for merge into M60

Robert, please merge the patch to M60 branch(3112),Beta RC cut is scheduled @ 4.00 PM PST today(06/07)

The following revision refers to this bug:
  https://skia.googlesource.com/skia/+/2fabc4f82ca8cd15f9b8f376377eba27bef59f6d

commit 2fabc4f82ca8cd15f9b8f376377eba27bef59f6d
Author: Robert Phillips <robertphillips@google.com>
Date: Wed Jun 07 17:44:37 2017

[M60 cherry-pick] Disable deferred proxies for M60 branch

No-Tree-Checks: true
No-Try: true
No-Presubmit: true
Bug:  720325 
Change-Id: I215af7db2536a27c941f5f1ff6f2af8cf41f4189
Reviewed-on: https://skia-review.googlesource.com/18592
Reviewed-by: Brian Salomon <bsalomon@google.com>

[modify] https://crrev.com/2fabc4f82ca8cd15f9b8f376377eba27bef59f6d/tests/DetermineDomainModeTest.cpp
[modify] https://crrev.com/2fabc4f82ca8cd15f9b8f376377eba27bef59f6d/src/gpu/GrSurfaceProxy.cpp
[modify] https://crrev.com/2fabc4f82ca8cd15f9b8f376377eba27bef59f6d/tests/ProxyTest.cpp
[modify] https://crrev.com/2fabc4f82ca8cd15f9b8f376377eba27bef59f6d/include/private/GrSurfaceProxy.h
[modify] https://crrev.com/2fabc4f82ca8cd15f9b8f376377eba27bef59f6d/tests/ProxyRefTest.cpp