Cast: build fix for win 64

BUG=307582

Review URL: https://codereview.chromium.org/27171004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@228791 0039d316-1c4b-4281-b951-d872f2087c98
Add video HW acceleration paths to webrtc-media WATCHLIST.

NOTRY=true

Review URL: https://codereview.chromium.org/27402004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@228793 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 228793