Update V8 to version 3.24.7.

TBR=ulan@chromium.org

Review URL: https://codereview.chromium.org/98273009

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@242415 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 242415
Update .DEPS.git

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@242416 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 242416