Roll src/third_party/skia/ b409c6ae5..d1bd30515 (1 commit).

https://skia.googlesource.com/skia.git/+log/b409c6ae5628..d1bd30515aaa

$ git log b409c6ae5..d1bd30515 --date=short --no-merges --format='%ad %ae %s'
2016-11-24 yujieqin Update PIEX

BUG=32591644

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

If the roll is causing failures, see:
http://www.chromium.org/developers/tree-sheriffs/sheriff-details-chromium#TOC-Failures-due-to-DEPS-rolls

CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_trusty_blink_rel
TBR=brianosman@google.com

Review-Url: https://codereview.chromium.org/2532803003
Cr-Commit-Position: refs/heads/master@{#434658}

DEPS

@@ -40,7 +40,7 @@ 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': 'b409c6ae5628b9fd4089e6e0d02c7f87e10e4a1e',
+  'skia_revision': 'd1bd30515aaae5a73755c0c57bad7dfa70d54011',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.