Version: 64.0.3251.0 (32/64-bit) 1ea7bc61dc1711a388b6031047506fc6e2a58051-refs/heads/master@{#512036}
OS: Windows (7,8,8.1,10),Linux (14.04 LTS)

What steps will reproduce the problem?
1. Launch chrome, navigate to 'New incognito window' and open devtools.
2. Now open emulated view and press 'F12' key continuously and observe incognito page

Actual: Flickering of contents on incognito page are seen after pressing 'F12' key to open devtools
Expected: Flickering of contents on incognito page are seen after pressing 'F12' key to open devtools

This is regression issue, broken in ‘M 64’ and below is the bisect results:
Good build:64.0.3250.0 (Revision: 426674)
Bad build: 64.0.3251.0 (Revision: 426989)

You are probably looking for a change made after 512027 (known good), but no lat
er than 512028 (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/0981af299f30526170a20702b1afd663196ea94a..482d3de5ea02c55b8d95b1155ba5ba126e50aa5d

From the CL above, assigning the issue to the concern owner 

@japhet- 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.

Suspect : https://chromium.googlesource.com/chromium/src/+/482d3de5ea02c55b8d95b1155ba5ba126e50aa5d

Thanks!

Note : Above issue is not seen on Mac OS.
 

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	Actual_video.mp4 612 KB View Download

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	Expected_video.mp4 576 KB View Download