roll skia DEPS to 13156

Chromium base revision: 246682 / 94610818
Old Skia revision: 13141
New Skia revision: 13156
Control CL: https://codereview.chromium.org/136033013

This CL was created by Skia's roll_deps.py script.

R=rmistry@google.com

Review URL: https://codereview.chromium.org/135143003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@246872 0039d316-1c4b-4281-b951-d872f2087c98
Update .DEPS.git

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@246873 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 246873
Start massaging the GYP files for building with clang on Windows

BUG=82385
TBR=cpu

Review URL: https://codereview.chromium.org/146043003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@246874 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 246874