Draw Cast logo when video is playing remotely

Paints a fixed VideoFrame showing a Cast logo, which replaces the local video
frames in embedded <video> elements whenever a video is being played remotely.

Requires corresponding patch to RemoteMediaPlayerBridge which overrides
is_remote() to return true: https://gerrit-int.chromium.org/43862

BUG=284478

Review URL: https://codereview.chromium.org/23437023

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@229928 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 229928