Roll src/third_party/skia 494f910:0ad24be

Summary of changes available at:
https://chromium.googlesource.com/skia/+log/494f910..0ad24be

CQ_EXTRA_TRYBOTS=tryserver.blink:linux_blink_rel,linux_blink_dbg
TBR=reed@google.com

Review URL: https://codereview.chromium.org/641373003

Cr-Commit-Position: refs/heads/master@{#299104}

DEPS

@@ -44,7 +44,7 @@ vars = {
   'boringssl_git': 'https://boringssl.googlesource.com',
   'libvpx_revision': 'efe9712d52c2d216fb3d1ceb508b8148847a7e4b',
   'sfntly_revision': '1bdaae8fc788a5ac8936d68bf24f37d977a13dac',
-  'skia_revision': '494f910aa0131fa99e6c7d13cbed4fdf9f558d6f',
+  'skia_revision': '0ad24bee47e734b1a8f86f40d7eb240cc20c618c',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling Skia
   # and V8 without interference from each other.