Roll Skia DEPS to 3800

Review URL: https://chromiumcodereview.appspot.com/10274011

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@134695 0039d316-1c4b-4281-b951-d872f2087c98

DEPS

@@ -52,7 +52,7 @@ vars = {
   "ffmpeg_hash": "69a5a2e6784b5e46326acecf6d5697b63d639ca9",
 
   "sfntly_revision": "128",
-  "skia_revision": "3787",
+  "skia_revision": "3800",
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling Skia
   # and V8 without interference from each other.