You are probably looking for a change made after 584307 (known good), but no later than 584308 (first known bad).

CHANGE-LOG 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/7f48b3540a8dd9e759fc592cb6ec895fed46b3d8..78a0d81fb18f78c01c6b2b3908c9e4f4d13dc97e

Suspect: https://chromium.googlesource.com/chromium/src/+/78a0d81fb18f78c01c6b2b3908c9e4f4d13dc97e

@ccameron: Could you please check whether this is caused with respect to your change, if not please help us in assigning it to the right owner.

NOTE: Issue is not seen on Win (7, 8, 8.1, 10) & Linux (14.04 LTS) OS.

Kindly refer the attached screen-cast.

Deleted: Actual_Cast.mov 4.2 MB

	Actual_Cast.mov 4.2 MB View Download

Deleted: Expected_Cast.mov 3.3 MB

	Expected_Cast.mov 3.3 MB View Download

Have a fix ready.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/f2bae22e479aaca78d061b379bead022dd5acd40

commit f2bae22e479aaca78d061b379bead022dd5acd40
Author: Christopher Cameron <ccameron@chromium.org>
Date: Mon Aug 20 23:22:37 2018

RemoteMacViews: Ensure window and view updates are synchronized

When updating the views::View size, ensure that the NSWindow size be
updated first (otherwise we end up with strange mismatches). Add a
TODO about merging methods here.

This requires access to the BridgedNativeWidget from
BridgedContentView, so make BridgedNativeWidget store a pointer to
BridgedContentView (from which it can access BridgedContentViewHost),
rather than storing a pointer to BridgedContentViewHost. Also change
one instance where we pulled the BridgedContentView from the NSWindow
to use the pointer directly.

Bug:  875776 ,  875731 
Change-Id: Ia9c3d4238f6824e5595baa5d4e856c34ead0fb75
Reviewed-on: https://chromium-review.googlesource.com/1181926
Commit-Queue: ccameron <ccameron@chromium.org>
Reviewed-by: Elly Fong-Jones <ellyjones@chromium.org>
Cr-Commit-Position: refs/heads/master@{#584582}
[modify] https://crrev.com/f2bae22e479aaca78d061b379bead022dd5acd40/ui/views/cocoa/bridged_content_view.h
[modify] https://crrev.com/f2bae22e479aaca78d061b379bead022dd5acd40/ui/views/cocoa/bridged_content_view.mm
[modify] https://crrev.com/f2bae22e479aaca78d061b379bead022dd5acd40/ui/views/cocoa/bridged_native_widget.h
[modify] https://crrev.com/f2bae22e479aaca78d061b379bead022dd5acd40/ui/views/cocoa/bridged_native_widget.mm

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/917518a286adb36cd3e7ccff6cdbe6e733539ec3

commit 917518a286adb36cd3e7ccff6cdbe6e733539ec3
Author: Christopher Cameron <ccameron@chromium.org>
Date: Tue Aug 21 00:00:02 2018

RemoteMacViews: Ensure window and view updates are synchronized

When updating the views::View size, ensure that the NSWindow size be
updated first (otherwise we end up with strange mismatches). Add a
TODO about merging methods here.

This requires access to the BridgedNativeWidget from
BridgedContentView, so make BridgedNativeWidget store a pointer to
BridgedContentView (from which it can access BridgedContentViewHost),
rather than storing a pointer to BridgedContentViewHost. Also change
one instance where we pulled the BridgedContentView from the NSWindow
to use the pointer directly.

TBR=ccameron@chromium.org

(cherry picked from commit f2bae22e479aaca78d061b379bead022dd5acd40)

Bug:  875776 ,  875731 
Change-Id: Ia9c3d4238f6824e5595baa5d4e856c34ead0fb75
Reviewed-on: https://chromium-review.googlesource.com/1181926
Commit-Queue: ccameron <ccameron@chromium.org>
Reviewed-by: Elly Fong-Jones <ellyjones@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#584582}
Reviewed-on: https://chromium-review.googlesource.com/1182582
Reviewed-by: ccameron <ccameron@chromium.org>
Cr-Commit-Position: refs/branch-heads/3528@{#8}
Cr-Branched-From: 2d67fa3c43ccc16edae0a742d902dd437795959b-refs/heads/master@{#584349}
[modify] https://crrev.com/917518a286adb36cd3e7ccff6cdbe6e733539ec3/ui/views/cocoa/bridged_content_view.h
[modify] https://crrev.com/917518a286adb36cd3e7ccff6cdbe6e733539ec3/ui/views/cocoa/bridged_content_view.mm
[modify] https://crrev.com/917518a286adb36cd3e7ccff6cdbe6e733539ec3/ui/views/cocoa/bridged_native_widget.h
[modify] https://crrev.com/917518a286adb36cd3e7ccff6cdbe6e733539ec3/ui/views/cocoa/bridged_native_widget.mm

Update:

Above issue is fix on Mac(10.12.6, 10.13.1, 10.13.6, 10.14) using latest build #70.0.3528.4 and #70.0.3529.3 and working as intended.

Thank you.

Deleted: Actual_Fix.mov 5.2 MB

	Actual_Fix.mov 5.2 MB View Download

Deleted: Fix.mov 6.2 MB

	Fix.mov 6.2 MB View Download