GPU: Add trace for real SwapBuffers.

There is too many abstractions in our surface classes to
determine 'real' SwapBuffers calls in traces. This adds
traces in all the relevant places where we do 'real' swaps.

BUG=334063

Review URL: https://codereview.chromium.org/137823002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@245107 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 245107