Roll src/third_party/skia/ bf63e616a..ff863bc55 (1 commit).

https://chromium.googlesource.com/skia.git/+log/bf63e616a67e..ff863bc550a8

$ git log bf63e616a..ff863bc55 --date=short --no-merges --format='%ad %ae %s'
2016-08-17 reed move private test for sect_with_horizontal into unittests

BUG=638575

CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_precise_blink_rel
TBR=robertphillips@google.com

Review-Url: https://codereview.chromium.org/2251693004
Cr-Commit-Position: refs/heads/master@{#412537}

DEPS

@@ -36,7 +36,7 @@ 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': 'bf63e616a67e8992e150d982cfcd6403994f39ad',
+  'skia_revision': 'ff863bc550a8738c9c2667be225e653636617a90',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.