Handle MEDIA_DISPLAY_VIDEO_CAPTURE cases

This CL handles MEDIA_DISPLAY_VIDEO_CAPTURE cases specifically in browser-side
MediaStreamManager and renderer-side UserMediaProcessor. This allows us to
link these specific calls from blink to MediaAccessHandler.

Bug: 326740
Change-Id: If12f9fe92a8b0ed7b30b0cad4c3c7ab140537566
Reviewed-on: https://chromium-review.googlesource.com/1170344
Commit-Queue: Emircan Uysaler <emircan@chromium.org>
Reviewed-by: Avi Drissman <avi@chromium.org>
Reviewed-by: Christian Fremerey <chfremer@chromium.org>
Reviewed-by: Guido Urdaneta <guidou@chromium.org>
Cr-Commit-Position: refs/heads/master@{#582838}
6 files changed