Roll Skia DEPS to r11958

R=bsalomon@google.com

Review URL: https://codereview.chromium.org/42463002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@231011 0039d316-1c4b-4281-b951-d872f2087c98
Update .DEPS.git

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@231012 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 231011
SVN changes up to revision 231012