roll skia DEPS to 13693

Chromium base revision: 255451 / 7223c870
Old Skia revision: 13678
New Skia revision: 13693
Control CL: https://codereview.chromium.org/181293008

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

Bypassing commit queue trybots:
NOTRY=true

Review URL: https://codereview.chromium.org/189283002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@255595 0039d316-1c4b-4281-b951-d872f2087c98
Update .DEPS.git

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@255596 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 255596