Roll src/third_party/skia 5df6fee:9b77796

Summary of changes available at:
https://chromium.googlesource.com/skia/+log/5df6fee..9b77796

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

Review URL: https://codereview.chromium.org/1133533005

Cr-Commit-Position: refs/heads/master@{#330373}

DEPS

@@ -42,7 +42,7 @@ vars = {
   'boringssl_git': 'https://boringssl.googlesource.com',
   'libvpx_revision': 'd1c022c097f22987d521643c4802b623e572393a',
   'sfntly_revision': '1bdaae8fc788a5ac8936d68bf24f37d977a13dac',
-  'skia_revision': '5df6fee929823f50c55cc50f7c882a309c1b1de9',
+  'skia_revision': '9b777967b1e531d0ebdb3349c4bd149fdb86589f',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling Skia
   # and V8 without interference from each other.