Add browser tests for enabling Google Drive offline mode on first run.

BUG=312466

Review URL: https://codereview.chromium.org/71013003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@235674 0039d316-1c4b-4281-b951-d872f2087c98
Telemetry: Filter invalid frame lengths from SurfaceFlinger data.

We use the SurfaceFlinger data to compute the lengths of the frames (normalized
to vsyncs). Sometimes the data is inconsistent and we get two frames that are
less than 1 vsync apart. Filter out these frame lengths (threshold length is
currently 0.5 vsyncs) and print a warning.

BUG=318093

Review URL: https://codereview.chromium.org/71353006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@235675 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 235675