Roll src/third_party/skia/ 1a8d67514..5238343ab (3 commits).

https://chromium.googlesource.com/skia.git/+log/1a8d675148ad..5238343ab27a

$ git log 1a8d67514..5238343ab --date=short --no-merges --format='%ad %ae %s'
2016-10-17 borenet Add a buildbotless Android bot
2016-10-17 msarett Avoid integer overflow in SkIcoCodec
2016-10-17 mtklein GN: ANGLE build completes now on Windows

CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_precise_blink_rel
TBR=mtklein@google.com

Review-Url: https://codereview.chromium.org/2424963002
Cr-Commit-Position: refs/heads/master@{#425732}
diff --git a/DEPS b/DEPS
index ca51ae19..4219dd1 100644
--- a/DEPS
+++ b/DEPS
@@ -39,7 +39,7 @@
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling Skia
   # and whatever else without interference from each other.
-  'skia_revision': '1a8d675148ad92a2f67c075d4f5ca856f416df2a',
+  'skia_revision': '5238343ab27a9f42983b6c79f199416a5ae58542',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.