Remove the logic to recreate stream texture for MSE video

We now hold the surface inside MediaSourcePlayer.
So when a new MediaCodec is recreated, we reuse the same surface object.
As a result, we no longer need to recreate the stream texture for each MediaCodec.

BUG=339191

Review URL: https://codereview.chromium.org/149273005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@251723 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 251723