Version: 52.0.2743.24 334afe94883b731af3eacab708ac03ba796d5c5b-refs/branch-heads/2743@{#181} (32/64-bit)
OS:  Windows (7,8,8.1,10),Linux (14.04 LTS),Mac OS X(10.10.5, 10.11.4)
URL : https://chrome.google.com/webstore/detail/plugins/nnfehgmkbbbhbadghlfkjekjkneppdak?utm_source=chrome-ntp-icon

What steps will reproduce the problem?
1) Launch chrome, navigate to above URL and add app
2) Now two new tabs get open after adding app
3) Observe the message in tab page which is displayed

Actual : Error message is displayed in tab page instead of post install message.
Expected : Post install message(Plugin button successfully install) should be displayed in tab page

This is a regression issue broken in 'M-51' and below is the manual regression and Change Log info:
Good build : 51.0.2699.0
Bad build : 51.0.2700.0

Change Log info:
https://chromium.googlesource.com/chromium/src/+log/51.0.2699.0..51.0.2700.0?pretty=fuller&n=10000

Suspecting : 384860 ?  

@toyoshim : Could you please help to reassign if your change is not the cause for this change.

 

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