Rewrite ffmpeg_binaries target to use GYP built-ins and branding conditions.

BUG=16657

Review URL: http://codereview.chromium.org/149554


git-svn-id: svn://svn.chromium.org/chrome/trunk/src@20548 0039d316-1c4b-4281-b951-d872f2087c98
2 files changed