Chrome Version: 67.0.3390.0 (Official Build)Revision ae47769a6d274cb8eeca0f8e7b9198d0b043975f-refs/heads/master@{#548636} 32/64-bit.
OS: Win(7,8,8.1,10), Mac(10.12.6, 10.13.1, 10.13.4) and Linux (14.04 LTS).

What steps will reproduce the problem?
1. Launch Chrome, go to NTP, open DevTools window and go to 'Style' section,.
2. Hover the mouse pointer on three dot icon and select 'Add box-shadow' icon .
3. Now drag the Blur slider to it’s extreme right (20px) and observe the NTP

Actual: Border outline for NTP is not seen on dragging the blur slider in 'Add box-shadow' dialog.
Expected: Border outline for NTP should seen on dragging the blur slider in 'Add box-shadow' dialog.

This is a regression issue, broken in M-65 series, below is manual regression range.

Good build: 65.0.3287.0 (Revision: 522297)
Bad build: 65.0.3288.0 (Revision: 522666)

Using the per-revision bisect providing the bisect results:

You are probably looking for a change made after 522427 (known good), but no later than 522428 (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/034134229bfcfe39482304614c615b826979d822..773623d293ed991e20596c4cb00e58610af5f395

Suspecting: https://chromium.googlesource.com/chromium/src/+/773623d293ed991e20596c4cb00e58610af5f395

@treib: 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.

NOTE: This issue is also reproducible on M-65 Stable (build # 65.0.3325.181) and M-66 Beta (build # 66.0.3359.81) and M-67 Dev (build # 67.0.3386.1)

Kindly review the attached screen-cast for reference.

Thank you.

 

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	Actual_behavior.mov 5.2 MB View Download

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	Expected behavior.mov 3.1 MB View Download