Chrome version : 63.0.3236.0 (Official Build) 2fa96eead8c5eea003b5b7fb4f9262b3d136d76b-refs/heads/master@{#507286} 32/64 bit
OS : Windows(7,8,10), Linux(14.04 LTS), Mac(10.12.6)

Test URLs :
URL 1 : https://chrome.google.com/webstore/detail/pdf-viewer/oemmndcbldboiebfnladdacbdfmadadm?utm_source=chrome-ntp-icon
URL 2 : http://cb.vu/unixtoolbox.pdf

What steps will reproduce the problem?
1. Launch chrome, navigate to test URL 1 and install an 'PDF Viewer' extension.
2. Navigate to test URL 2 and click on 'Magnifying glass' icon seen at the LHS of PDF toolbar.
3. Observe the ghost text inside search box. (kindly review an attached screen shot)

Actual Result : Ghost text in search box is very faint and not easily visible.

Expected Result : Ghost text should be little darker and easy to read.

This is a regression issue broken in ‘M-57’ and using the per-revision bisect providing the bisect results,
Good build : 57.0.2976.0 (Revision : 442166)
Bad build : 57.0.2977.0 (Revision : 442447)

You are probably looking for a change made after 442205 (known good), but no later than 442206 (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/15eb973b8a0e33c0397fe7b21a7aaa9eb3d20460..1a64a69aa334a8cafcbffd75a7af0841be1285b0

Suspect : https://chromium.googlesource.com/chromium/src/+/1a64a69aa334a8cafcbffd75a7af0841be1285b0

@aboxhall : Could you please look into the issue, pardon me if it has nothing to do with your changes and if possible please assign it to concern owner.

Thank you.
 

Deleted: Searchbox_ghost_text.png 54.2 KB

	Searchbox_ghost_text.png 54.2 KB View Download

Deleted: Actual_Result.mp4 1.1 MB

	Actual_Result.mp4 1.1 MB View Download

Deleted: Expected_Result.mp4 806 KB

	Expected_Result.mp4 806 KB View Download