Handle getDisplayMedia case in MediaStreamCaptureIndicator

This CL adds getDisplayMedia() calls going through MediaStreamCaptureIndicator
into the existing |desktop_stream_count_|.

Bug: 326740
Change-Id: I4c16e41c281d96bd9012b4bb66381d5c81d351ca
Reviewed-on: https://chromium-review.googlesource.com/1180097
Reviewed-by: Weiyong Yao <braveyao@chromium.org>
Reviewed-by: Sergey Ulanov <sergeyu@chromium.org>
Commit-Queue: Emircan Uysaler <emircan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#584228}
1 file changed