Roll src/third_party/skia/ 6e9ac1249..2563601fc (1 commit).

https://skia.googlesource.com/skia.git/+log/6e9ac12495f3..2563601fc2b0

$ git log 6e9ac1249..2563601fc --date=short --no-merges --format='%ad %ae %s'
2016-11-11 raftias Initial implementation of a SkColorSpace_A2B xform

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/2492403002
Cr-Commit-Position: refs/heads/master@{#431734}

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': '6e9ac12495f3b64b6ea8860bb9f99c43cd33aa08',
+  'skia_revision': '2563601fc2b0505619f905f86bd249ae630197cc',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.