Roll src/third_party/skia/ 3d3a65c48..5934646b4 (4 commits).

https://chromium.googlesource.com/skia.git/+log/3d3a65c48816..5934646b4937

$ git log 3d3a65c48..5934646b4 --date=short --no-merges --format='%ad %ae %s'
2016-10-24 msarett Help msvs compile SkColorSpaceXform faster
2016-10-24 scroggo Move third_party/gif's license into its own file GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2448573002
2016-10-24 scroggo Differentiate animated image results
2016-10-24 brianosman Populate ALL copies of a command line flag during parsing

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=reed@google.com

Review-Url: https://codereview.chromium.org/2452473002
Cr-Commit-Position: refs/heads/master@{#427256}

DEPS

@@ -39,7 +39,7 @@ 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': '3d3a65c488162ef1db0b35adf3235d012b04c88d',
+  'skia_revision': '5934646b4937a05d5e8297448ea6613a89f8903a',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.