Roll src/third_party/skia/ da7136750..2b3c2a3ff (1 commit).

https://chromium.googlesource.com/skia.git/+log/da7136750d30..2b3c2a3ff916

$ git log da7136750..2b3c2a3ff --date=short --no-merges --format='%ad %ae %s'
2016-09-08 mtklein GN: add sanitize arg

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

Review-Url: https://codereview.chromium.org/2323823002
Cr-Commit-Position: refs/heads/master@{#417317}

DEPS

@@ -36,7 +36,7 @@ vars = {
   # 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': 'da7136750d30f5f8a38808414e0f67f3382edacf',
+  'skia_revision': '2b3c2a3ff9166e92ca1700e695c30ae729a3f10c',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.