Chrome Version: 66.0.3352.0 (Official Build) db148559378834dcddbc7066d6f899b5e227d426-refs/heads/master@{#538313}(32/64 bit)
OS: Win(7,8.1,8,10),Mac(10.12.6).

URL: https://pdfobject.com/examples/pdfjs-forced-with-querystring.html

Steps to reproduce:
1. Launch chrome and navigate to above URL.
2. Click on Tools button on PDF and click on presentation mode
3. Now press ‘Esc’ button and observe.

Actual: PDF page appears blank after rendering in presentation mode.
Expected: PDF page should not turn blank after rendering in presentation mode.

This is Regression issue broken in 'M-66’ and Using the per-revision bisect providing the bisect results,

Good Build:66.0.3349.0 (Revision: 537111) 
Bad Build:66.0.3350.0  (Revision: 537342) 

You are probably looking for a change made after 537239 (known good), but no later than 537240 (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/d3f8d267ec975458cd5adfb951f38bb5c019ad24..25ceb614d45226635207d6125c4f339c3e34492c

Suspect: https://chromium.googlesource.com/chromium/src/+/25ceb614d45226635207d6125c4f339c3e34492c

@ccameron:  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: Issue is not seen on Linux(14.04 LTS) and other Mac(10.13.1,12.13.4) OS

Kindly refer attached screen cast 
 

Deleted: Actual_result.mov 7.7 MB

	Actual_result.mov 7.7 MB View Download

Deleted: Expected_result.mov 9.5 MB

	Expected_result.mov 9.5 MB View Download