Roll Skia DEPS to r11688

DEPS

 # When adding a new dependency, please update the top-level .gitignore file
 # to list the dependency's destination directory.
 
 vars = {
   # Use this googlecode_url variable only if there is an internal mirror for it.
   # If you do not know, use the full path while defining your new deps entry.
   "googlecode_url": "http://%s.googlecode.com/svn",
   "sourceforge_url": "http://svn.code.sf.net/p/%(repo)s/code",
   "webkit_trunk": "http://src.chromium.org/blink/trunk",
   "nacl_trunk": "http://src.chromium.org/native_client/trunk",
@@ skipping 12 matching lines @@
   "libvpx_revision": "227030",
   "lss_revision": "24",
 
   # These two FFmpeg variables must be updated together.  One is used for SVN
   # checkouts and the other for Git checkouts.
   "ffmpeg_revision": "227119",
   "ffmpeg_hash": "aacd7f27b8e80d4371bdf77e46dff5396bc66b9b",
 
   "sfntly_revision": "134",
   "lighttpd_revision": "33737",
-  "skia_revision": "11659",
-  "skia_hash": "57f088fa49a71ee4cb8fb24b4b995edec71ae90f",
+  "skia_revision": "11688",
+  "skia_hash": "a0f4a8643b64e19c9ba063f795e15f7b9a96afe1",
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling Skia
   # and V8 without interference from each other.
   "v8_revision": "17097",
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling WebRTC
   # and V8 without interference from each other.
   "webrtc_revision": "4948",
   "jsoncpp_revision": "248",
   "nss_revision": "223139",
@@ skipping 569 matching lines @@
     "pattern": ".",
     "action": ["python", "src/build/gyp_chromium"],
   },
   {
     # Check for landmines (reasons to clobber the build).
     "name": "landmines",
     "pattern": ".",
     "action": ["python", "src/build/landmines.py"],
   },
 ]