Chrome Version : 71.0.3578.44 (Official Build) 3a7f6c7b91447d350f91af0314a4b501428c1b13-refs/branch-heads/3578@{#576} 32/64 bit
OS : Mac(10.13.6, 10.14.2), Linux(14.04 LTS), Windows(10 Touch device)

Test URL : https://drive.google.com/drive/folders/1wG6Bt_JmqPlWvXjdMT_9LKzpWq0i8jcE?usp=sharing

What steps will reproduce the problem?
1. Launch chrome, navigate to above test URL and download & save 'Camera Capture Sample' extension folder on desktop.
2. Navigate to chrome://extensions/ , enable 'Developer mode' option, click on 'Load unpacked' button and install previously downloaded 'Camera Capture Sample' extension from desktop.
3. Go to chrome://apps and launch extension.
4. Click on 'Enable camera' button in extension window and observe.

Actual Result : 'Camera Capture Sample' extension does not initiate camera even when device camera is on.

Expected Result : 'Camera Capture Sample' extension should capture and show camera contents on screen after step 4.

This is a regression issue broken in M-71 and below is the bisect information:
Good Build : 71.0.3548.0 (Revision : 589800)
Bad Build : 71.0.3549.0 (Revision : 590119)

Chromium bisect URL:
https://chromium.googlesource.com/chromium/src/+log/771206507ab469fe7a382befcf273c42ef3cc702..a9d73d33ae5744456aece5cb170b802a77451462

Suspecting : r589875 ?

battre@ : 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. Unable to provide bisect using 'per-revision' script as it shows "We don't have enough builds.." error message for above regression range, hence provided suspect through 'Chromium bisect'.
2. Issue is also seen in Dev build Canary #72.0.3605.0 and Dev #72.0.3602.2
3. Unable to repro issue in Mac mini (10.13.1) and Windows(7,8) machines.

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Kindly review an shared screencasts from below URL -
https://drive.google.com/drive/folders/16e1J47g-c71M8omr2K4QnnT8Z_JmMbLo?usp=sharing

Thank you..!