libyuv r976 sets return value from MJPGToI420 based on success of jpeg decoding.
BUG=none
TESTED=libyuv unittest MJPGToI420 added.
R=mflodman@chromium.org

Review URL: https://codereview.chromium.org/133933012

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@247439 0039d316-1c4b-4281-b951-d872f2087c98
Update .DEPS.git

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@247440 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 247440