Chrome Version : 68.0.3440.33 (Official Build) d62017a8f8d8d64411d2c510a5355c88b0cf9671-refs/branch-heads/3440@{#460} 64-bit
OS: Mac (10.12.6, 10.13.1, 10.13.5, 10.13.6)

Pre-condition: Enable "Use Views browser windows instead of Cocoa." flag in chrome://flags

Steps to reproduce:
1. Launch chrome,  Navigate to chrome://apps.
2. Open incognito window from wrench menu.
3. In incognito window, navigate to chrome://bookmarks/.
4. Observe.

Actual Result: Glimpse of chrome://apps page is seen while navigating to chrome://bookmarks/ from incognito window.
Expected Result: Glimpse of chrome://apps page should not been seen while navigating to chrome://bookmarks/ from incognito window.

This is a regression issue, broken in M-68 series and providing the bisect using per-revision script :

Good Build: 68.0.3437.0 (Revision:560454)
Bad Build:  68.0.3438.0 (Revision:560883)

You are probably looking for a change made after 560679 (known good), but no later than 560680 (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/e0042c0f1b632e43b9f5343822bbdf1294fc6d1c..200d56fbfb923ba7fb14d7374e198ebea272fbf6

Suspect: https://chromium.googlesource.com/chromium/src/+/200d56fbfb923ba7fb14d7374e198ebea272fbf6

@ccameron: 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.

Note:
1. Issue is also seen in M-69 Canary build #69.0.3466.0 .
2. Issue is not seen on Windows (7, 8, 8.1, 10) & Linux (14.04 LTS) OS.

Kindly refer attached screen-cast.

Thank You..!!
 

Deleted: Expected Result.mov 4.6 MB

	Expected Result.mov 4.6 MB View Download

Deleted: Actual_Result.mov 5.1 MB

	Actual_Result.mov 5.1 MB View Download