Roll src/third_party/skia/ 982e7c502..19ff1035d (2 commits).

https://chromium.googlesource.com/skia.git/+log/982e7c502f44..19ff1035d333

$ git log 982e7c502..19ff1035d --date=short --no-merges --format='%ad %ae %s'
2016-08-31 egdaniel Always add a barrier when old layout was general in vulkan.
2016-08-31 senorblanco Revert of Screenspace AA tessellated path rendering. (patchset #37 id:730001 of https://codereview.chromium.org/1152733009/ )

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

Review-Url: https://codereview.chromium.org/2297033003
Cr-Commit-Position: refs/heads/master@{#415740}

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': '982e7c502f4499044a4bff8420cdddddce0ce357',
+  'skia_revision': '19ff1035d3334ffa513c93edce04662bb5ead5bd',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.