Roll src/third_party/skia/ ea70c4bb2..f2944815e (3 commits).

https://chromium.googlesource.com/skia.git/+log/ea70c4bb2239..f2944815e5e4

$ git log ea70c4bb2..f2944815e --date=short --no-merges --format='%ad %ae %s'
2016-07-20 kjlubick Add vulkan sdk to CIPD
2016-07-20 reed re-chop if we fail on a big-bad-cubic
2016-07-20 bungeman Improve assert reporting.

BUG=629455

CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_blink_rel
TBR=jcgregorio@google.com

Review-Url: https://codereview.chromium.org/2164053002
Cr-Commit-Position: refs/heads/master@{#406636}

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': 'ea70c4bb22394c8dcc29a369d3422a2b8f3b3e80',
+  'skia_revision': 'f2944815e5e490c843c5a364fcaae2471526562f',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.