Roll Skia DEPS to r13603

This is the same as: https://codereview.chromium.org/177043008/

Please see that CL for the trybots

R=rmistry@google.com

Review URL: https://codereview.chromium.org/183033003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@253777 0039d316-1c4b-4281-b951-d872f2087c98
Update .DEPS.git

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@253778 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 253778