Use webrtc::MouseCursorMonitor for cursor shapes instead of
webrtc::VideoFrameCapturer, in preparation for deprecating cursor shape
functionality in the latter.
Fix memory corruption in VideoSchedulerTests_StartAndStop, where a lingering
capture task could trigger a expectation action declared on the stack during
tear down. My changes to the test somehow made the race condition more likely.
BUG=324033
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=247689
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=248045
Review URL: https://codereview.chromium.org/92473002
Cr-Commit-Position: refs/heads/master@{#288226}
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@288226 0039d316-1c4b-4281-b951-d872f2087c98
20013200c2