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This path is super not tested. In the absence of being able to create an IOSurface
and do a pixel test, this makes sure the IOSurface layer's drawing path issues the
appropriate calls on the context to draw - including using the right texture target
which would have caught a regression with the VideoResourceUpdater CL.

R=enne, jamesr
BUG=230300

Review URL: https://chromiumcodereview.appspot.com/14098007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@195237 0039d316-1c4b-4281-b951-d872f2087c98