Update V8 to version 3.22.21.

TBR=danno@chromium.org

Review URL: https://codereview.chromium.org/39783002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@230716 0039d316-1c4b-4281-b951-d872f2087c98
Update .DEPS.git

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@230717 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 230716
SVN changes up to revision 230717