Version: 65.0.3323.0 (Official Build) Revision	470d3a6be2f380affa8de3dc0dd1508f3eeba9f7-refs/heads/master@{#529554}(32/64-bit)
OS: Windows (7,8,8.1,10),Linux (14.04 LTS),Mac OS X(10.12.6,10.13.1,10.13.3)

What steps will reproduce the problem?
1. Launch chrome,navigate to chrome://flags/ and in search field press 'Space bar' key,observe
 
Actual: Close icon doesn't appear in search field after pressing space bar key 
Expected: Close icon should appear in search field after pressing space bar key 

This is regression issue, broken in ‘M 64’ and below is the bisect info :
Good build: 64.0.3253.0  (Revision: 512378).
Bad build: 64.0.3254.0 (Revision: 512694).

You are probably looking for a change made after 512493 (known good), but no later than 512494 (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/e7f9a9155ea03d25da4e5269c9532fce9d5f77ac..dd64a192d8b8a180fb40f389f4ecf8680467e968

Suspect : https://chromium.googlesource.com/chromium/src/+/dd64a192d8b8a180fb40f389f4ecf8680467e968

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

@edwardjung- 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.

Thanks!

Note : Issue is seen on latest Dev build 65.0.3322.3
 

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