Roll src/third_party/skia/ 570f8af47..02aed95f9 (2 commits).

https://chromium.googlesource.com/skia.git/+log/570f8af47305..02aed95f9c7c

$ git log 570f8af47..02aed95f9 --date=short --no-merges --format='%ad %ae %s'
2016-07-30 mtklein Revert of GrFP can express distance vector field req.,  program builder declares variable for it (patchset #20 id:370001 of https://codereview.chromium.org/2114993002/ )
2016-07-30 mtklein Revert of Tidy up SkNx_neon. (patchset #3 id:40001 of https://codereview.chromium.org/2196773002/ )

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

Review-Url: https://codereview.chromium.org/2201593003
Cr-Commit-Position: refs/heads/master@{#408879}

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': '570f8af4730578db79fbb7842389178f85dd8699',
+  'skia_revision': '02aed95f9c7c6745c02e9aa8604d27d7a3ae93db',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.