Chrome Version: 53.0.2780.0 Revision 5453dc6abc2d7c797c7f9f16df8aed8e6358a217-refs/heads/master@{#402053}(32/64 bit)
OS: Windows(7,8,10), Mac(10.10.5, 10.11.4), Linux(14.04 LTS)

URL: https://chrome.google.com/webstore/detail/pdf-viewer/oemmndcbldboiebfnladdacbdfmadadm?hl=en 

Steps:
1. Launch chrome,navigate to above url and click on 'ADD TO CHROME' button.
2. Open pdf file(e.g.http://www.orimi.com/pdf-test.pdf) and click on extension icon near ominibox.
3. Press 'Ctrl+A' to select whole URL in text area, then press left arrow key and observe. 

Actual: Unnecessary cursor is seen after one line space on pressing left arrow key.

Expected: Cursor should be seen beside the selected URL on pressing left arrow key.

This is a regression issue broken in 'M-51',below is manual bisect range:

Good Build: 51.0.2681.0
Bad Build: 51.0.2682.0

Narrow Bisect: https://chromium.googlesource.com/chromium/src/+log/dff8eb21c3e4882bb0c522d83a46bb16d8a2643a..3242e5d006f531af516d464c7084dde7e1346f0d?pretty=fuller&n=10

Suspecting: r381668 ?

Please help to re-assign if your change is not the cause for this issue.

 

Deleted: Actual_video.mp4 599 KB

	Actual_video.mp4 599 KB View Download

Deleted: Expected_video.mp4 332 KB

	Expected_video.mp4 332 KB View Download