Good Build:65.0.3294.0
Bad Build:65.0.3295.0

You are probably looking for a change made after 524203 (known good), but no later than 524204 (first known bad).

CHANGELOG URL:

The script might not always return single CL as suspect as some perf builds might get missing due to failure.

  https://chromium.googlesource.com/chromium/src/+log/1e920b32c7c3000523870464e0a8954a0474790e..2e4a432454ac3f04d6c5fa8f17c49ce3026217d6

Suspect:https://chromium.googlesource.com/chromium/src/+/2e4a432454ac3f04d6c5fa8f17c49ce3026217d6

junov@:Kindly help to reassign, if your changes are not related to this issue.

 Note:Issue is not seen on Win(7,8,10),Linux(14.04 LTS)   

Deleted: Actual_result.mov 6.0 MB

Actual_result.mov 6.0 MB Download

Deleted: Expected_result.mov 5.0 MB

Expected_result.mov 5.0 MB Download

Note:
Above issue is also seen on latest canary 65.0.3298.0

Doodles change every day and vary by country.  Can you provide a URL from the doodle archive?

Assuming it is this one: https://www.google.com/doodles/holidays-2017-day-1

Repro confirmed. Issue appears to be mac-specific.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/c1fd548f2cf9a3585e82d800cfc40167a48bb582

commit c1fd548f2cf9a3585e82d800cfc40167a48bb582
Author: Justin Novosad <junov@chromium.org>
Date: Tue Dec 19 00:55:31 2017

Fix canvas flickering and broken updates on Mac

CanvasResource_GpuMemoryBuffer was not refreshing its
sync token when new content was added, resulting in recycled
buffers never getting their contents flushed.

BUG= 795635 ,  795252 
TBR=xlai@chromium.org
NOTRY=true

Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel;master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2
Change-Id: I77a9e2cdba1397a664eda1e46d9126b1e2c8114d
Reviewed-on: https://chromium-review.googlesource.com/832350
Reviewed-by: Justin Novosad <junov@chromium.org>
Commit-Queue: Justin Novosad <junov@chromium.org>
Cr-Commit-Position: refs/heads/master@{#524888}
[modify] https://crrev.com/c1fd548f2cf9a3585e82d800cfc40167a48bb582/third_party/WebKit/Source/platform/graphics/CanvasResource.cpp
[modify] https://crrev.com/c1fd548f2cf9a3585e82d800cfc40167a48bb582/third_party/WebKit/Source/platform/graphics/CanvasResource.h

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/59620135abb6dc7802569b3a8a7214d19657c2b1

commit 59620135abb6dc7802569b3a8a7214d19657c2b1
Author: Justin Novosad <junov@chromium.org>
Date: Tue Dec 19 01:00:21 2017

Fix canvas flickering and broken updates on Mac

CanvasResource_GpuMemoryBuffer was not refreshing its
sync token when new content was added, resulting in recycled
buffers never getting their contents flushed.

BUG= 795635 ,  795252 
TBR=junov@chromium.org, xlai@chromium.org
NOTRY=true

(cherry picked from commit c1fd548f2cf9a3585e82d800cfc40167a48bb582)

Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel;master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2
Change-Id: I77a9e2cdba1397a664eda1e46d9126b1e2c8114d
Reviewed-on: https://chromium-review.googlesource.com/832350
Reviewed-by: Justin Novosad <junov@chromium.org>
Commit-Queue: Justin Novosad <junov@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#524888}
Reviewed-on: https://chromium-review.googlesource.com/833069
Cr-Commit-Position: refs/branch-heads/3298@{#4}
Cr-Branched-From: 6586a208880a70a00856529493741971ecfea5c2-refs/heads/master@{#524617}
[modify] https://crrev.com/59620135abb6dc7802569b3a8a7214d19657c2b1/third_party/WebKit/Source/platform/graphics/CanvasResource.cpp
[modify] https://crrev.com/59620135abb6dc7802569b3a8a7214d19657c2b1/third_party/WebKit/Source/platform/graphics/CanvasResource.h

Rechecked the above issue on Mac(10.12.6,10,13.2) OS with latest canary chrome version :65.0.3299.0 and Dev #65.0.3298.3 and fix is working as intended.
Kindly refer the attached screen cast for reference.

Deleted: Result.mov 7.0 MB

Result.mov 7.0 MB Download

 Issue 795944  has been merged into this issue.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/1fd5440ed9a178828fcc752bc1b180c3ad715086

commit 1fd5440ed9a178828fcc752bc1b180c3ad715086
Author: Justin Novosad <junov@chromium.org>
Date: Wed Jan 10 21:14:06 2018

Add test for SyncToken updates in 2D canvas GpuMemoryBuffer code path

This change adds a test and also re-arranges the fix from previous CL:
https://chromium-review.googlesource.com/c/chromium/src/+/832350

BUG= 796079 , 795635 

Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel;master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2
Change-Id: Iff30eeebaf72bb4dc34be0dc7bd4afc3fc2e9ced
Reviewed-on: https://chromium-review.googlesource.com/836752
Commit-Queue: Justin Novosad <junov@chromium.org>
Reviewed-by: Olivia Lai <xlai@chromium.org>
Cr-Commit-Position: refs/heads/master@{#528423}
[modify] https://crrev.com/1fd5440ed9a178828fcc752bc1b180c3ad715086/third_party/WebKit/Source/platform/BUILD.gn
[modify] https://crrev.com/1fd5440ed9a178828fcc752bc1b180c3ad715086/third_party/WebKit/Source/platform/graphics/CanvasResource.cpp
[modify] https://crrev.com/1fd5440ed9a178828fcc752bc1b180c3ad715086/third_party/WebKit/Source/platform/graphics/CanvasResource.h
[modify] https://crrev.com/1fd5440ed9a178828fcc752bc1b180c3ad715086/third_party/WebKit/Source/platform/graphics/CanvasResourceTest.cpp

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/3a08442c76baf9fe44415a14aee1a2e7a95ae582

commit 3a08442c76baf9fe44415a14aee1a2e7a95ae582
Author: Mostyn Bramley-Moore <mostynb@vewd.com>
Date: Wed Jan 10 23:03:21 2018

[jumbo] rename duplicate FakePlatformSupport class

Followup to https://chromium-review.googlesource.com/c/chromium/src/+/836752
in order to un-break jumbo builds.

TBR=junov@chromium.org
BUG= 796079 , 795635 

Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel;master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2
Change-Id: I605b8bb07357f6aa478692ffdb6b12454b891267
Reviewed-on: https://chromium-review.googlesource.com/860923
Reviewed-by: Mostyn Bramley-Moore <mostynb@vewd.com>
Commit-Queue: Mostyn Bramley-Moore <mostynb@vewd.com>
Cr-Commit-Position: refs/heads/master@{#528460}
[modify] https://crrev.com/3a08442c76baf9fe44415a14aee1a2e7a95ae582/third_party/WebKit/Source/platform/graphics/CanvasResourceTest.cpp