GitLab

This makes it possible to release all shared memory used by a
pixel transfer buffer without destroying the Id.

BUG=163482
TEST=manual


Review URL: https://chromiumcodereview.appspot.com/11415223

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@170776 0039d316-1c4b-4281-b951-d872f2087c98