cc: Unify use of DidSwapBuffers() and did_request_swap

Use OutputSurface::DidSwapBuffers() as the source of whether
we swapped or not.

[email protected]
BUG=363414
TEST=cc_unittests

Review URL: https://codereview.chromium.org/246753008

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@269738 0039d316-1c4b-4281-b951-d872f2087c98
24 files changed