Update WebKit to r167806.

BUG=none
TEST=none
R=haraken@chromium.org
TBR=haraken

Review URL: https://codereview.chromium.org/180843002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@253321 0039d316-1c4b-4281-b951-d872f2087c98
Update .DEPS.git

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@253322 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 253322