Chrome Version:54.0.2840.34 (Official Build) dffe0812950a59945440dbdf19d836fd232c84d3-refs/branch-heads/2840@{#453}(64 bit)
OS: Windows (7,8,8.1,10),Linux (14.04 LTS),Mac OS X(10.10.5, 10.11.4). 

What steps will reproduce the problem?
1. Launch chrome,navigate chrome://md-settings and click on 'Page zoom' drop down list.
2. Now select zoom 75% and click on 25% and observe top LHS of page

Actual : Blink of 'Page zoom' drop down list is seen after clicking on 25% from 75% page zoom
Expected : Blink of 'Page zoom' drop down list should not be seen after clicking on 25% from 75% page zoom

This is a non-regression issue, seen from M-49 series as 'Page zoom' drop down list started working from build # 49.0.2574.0 

Kindly review the attached video for reference.
 
 

Deleted: Actual_video.mov 3.7 MB

Actual_video.mov 3.7 MB Download