Roll src/third_party/skia/ ca85fc315..970225b2b (5 commits).

https://skia.googlesource.com/skia.git/+log/ca85fc3159e9..970225b2ba73

$ git log ca85fc315..970225b2b --date=short --no-merges --format='%ad %ae %s'
2016-11-10 halcanary SkPDF: paths as rects when possible
2016-11-10 bsalomon Add integer texture support.
2016-11-10 fmalita Simplify SkBitmapProvider
2016-11-10 rmistry Update skia.org docs to reference Gerrit instead of Rietveld
2016-11-10 csmartdalton skpbench: add "resultsfile" option

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_precise_blink_rel
TBR=scroggo@google.com

Review-Url: https://codereview.chromium.org/2491963002
Cr-Commit-Position: refs/heads/master@{#431313}

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': 'ca85fc3159e9735b8e589bbc5b736a34affb12b5',
+  'skia_revision': '970225b2ba73524e00cb020db5324167e9a83317',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.