Roll src/third_party/skia/ 5af600e42..b726d58ef (5 commits)

https://skia.googlesource.com/skia.git/+log/5af600e42c56..b726d58efc91

$ git log 5af600e42..b726d58ef --date=short --no-merges --format='%ad %ae %s'
2017-03-09 robertphillips Partially defer SkImage_Gpu
2017-03-10 halcanary FuzzCanvas: fuzz_enum_range template
2017-03-09 reed increase Builder's prealloc size after colorspace change
2017-03-10 reed clipstacks can be on the stack or embedded, therefore should not be ref-counted
2017-03-09 reed Clients can provide preallocated storage to clipstack

Created with:
  roll-dep src/third_party/skia


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_trusty_blink_rel
TBR=djsollen@chromium.org

Change-Id: I800eba20476a4ae487985b76b23b42e0138ab3a0
Reviewed-on: https://chromium-review.googlesource.com/452669Reviewed-by: Skia Deps Roller <skia-deps-roller@chromium.org>
Commit-Queue: Skia Deps Roller <skia-deps-roller@chromium.org>
Cr-Commit-Position: refs/heads/master@{#456071}

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': '5af600e42c5660d01e209d5634c15352202368b8',
+  'skia_revision': 'b726d58efc91c4eefa5cea0881a823ee108db8fd',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.