Chrome Version:64.0.3278.0 (Official Build) 6218872807f9d8f9e64630c7cefe0ab18954585a-refs/heads/master@{#519169}(32/64 bit)
OS: Windows (7,8,10),Linux (14.04 LTS),Mac(10.12.6, 10.13.2).

Steps to reproduce:
1.Launch chrome and navigate to 'chrome://settings/siteData'.
2.In the "Search cookies" text field enter a search string that is present in the cookie list and observe "Remove all Shown" button on every key press.(Please observe the attached screen cast)

Actual Result: Unnecessary flickering of "Remove all Shown" button is seen while entering data in the search field.
Expected Result: Flickering of "Remove all Shown" button should not be seen.

This is Regression issue broken in 'M-64' and Using the per-revision bisect providing the bisect results,
Good Build:64.0.3244.0(Revision: 509945)
Bad Build:64.0.3245.0(Revision: 510270)

You are probably looking for a change made after 509956 (known good), but no later than 509957 (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/ff5b6944f36e0e4fcc62d8c65ce07b2b17809291..34eeae65c51a2e8c545daef878a74e1efc6c81ef

Suspect:https://chromium.googlesource.com/chromium/src/+/34eeae65c51a2e8c545daef878a74e1efc6c81ef

@dschuyler - 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.

Thank you
 

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	ActualVideo.mp4 1.1 MB View Download

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	ExpectedVideo.mp4 886 KB View Download