Roll src/third_party/skia/ 2732e186a..bf680c30a (1 commit).

https://chromium.googlesource.com/skia.git/+log/2732e186a113..bf680c30a280

$ git log 2732e186a..bf680c30a --date=short --no-merges --format='%ad %ae %s'
2016-03-16 senorblanco Image filters: fix the zero-sigma fast path in SkBlurImageFilter.

CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel
TBR=bungeman@google.com

Review URL: https://codereview.chromium.org/1808683003

Cr-Commit-Position: refs/heads/master@{#381611}

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': '2732e186a1132f91fbacd3509e2a990731f4e13c',
+  'skia_revision': 'bf680c30a280d4d7b3b8d5fedf23defff348cb50',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.