Updating trunk VERSION from 1851.0 to 1852.0

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@252488 0039d316-1c4b-4281-b951-d872f2087c98
Don't process pending prefetch events if we fail to create video decoder job

In the current logic, we continue to process prefetch requests if video decoder job fails to create due to empty surface.
However, that may lead to a NPE because we do not do null check on video_decoder_job_ in our code
Since StartInternal() won't do anything if video decoder job is null, we can return early when the surface is empty.
Playback will continue once a non-empty surface is passed to MSP.

BUG=343508

Review URL: https://codereview.chromium.org/171233007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@252489 0039d316-1c4b-4281-b951-d872f2087c98
QUIC - clarified comments for persisting crypto config per comments in
https://codereview.chromium.org/154933003/#ps2970001

R=wtc@chromium.org

Review URL: https://codereview.chromium.org/174533002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@252491 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 252489
Implementation of Randomized Aggregatable Privacy-Preserving Ordinal Responses (RAPPORs).

See the design doc at http://www.chromium.org/developers/design-documents/rappor

BUG=328168
TBR=darin@chromium.org

Review URL: https://codereview.chromium.org/49753002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@252492 0039d316-1c4b-4281-b951-d872f2087c98
Implement account switcher as action-bar navigation spinner.

BUG=338773

Review URL: https://codereview.chromium.org/165743002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@252493 0039d316-1c4b-4281-b951-d872f2087c98
Update .DEPS.git

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@252494 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 252494