Roll src/third_party/skia/ 0e8fc8b9e..1951f3ddb (5 commits).

https://skia.googlesource.com/skia.git/+log/0e8fc8b9e6a1..1951f3ddbddc

$ git log 0e8fc8b9e..1951f3ddb --date=short --no-merges --format='%ad %ae %s'
2016-12-09 bsalomon Rename testingOnly_drawBatch to testingOnly_addDrawOp and sk_sp
2016-12-09 mtklein bicubic, attempt gazillion
2016-12-09 bsalomon Make GrRenderTargetOpList::addDrawOp use sk_sp
2016-12-09 bsalomon Fix comment formatting for GrRenderTargetContext::drawArc
2016-12-09 halcanary tools and docs: clean up gyp-specific things

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=herb@google.com

Review-Url: https://codereview.chromium.org/2565433005
Cr-Commit-Position: refs/heads/master@{#437741}

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': '0e8fc8b9e6a138cf4a66b421fb824679df717329',
+  'skia_revision': '1951f3ddbddcf5e7cdfe151981d13a1bdb6a3baa',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.