Rolling Skia DEPS 2836->2850

Control group (whitespace change) is http://codereview.chromium.org/8917009
Review URL: http://codereview.chromium.org/8922003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@114053 0039d316-1c4b-4281-b951-d872f2087c98

DEPS

@@ -36,7 +36,7 @@ vars = {
   "lss_revision": "9",
   "ffmpeg_revision": "112050",
   "sfntly_revision": "117",
-  "skia_revision": "2836",
+  "skia_revision": "2850",
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling Skia
   # and V8 without interference from each other.