Skia roll b2721f7:fbd3576

https://skia.googlesource.com/skia/+log/b2721f7372652496e1b1ec722883904caa8134a8..fbd3576a18799da88988ef26fa9bce09e8ebba37

CQ_EXTRA_TRYBOTS=tryserver.chromium.linux:linux_layout_rel
TBR=bsalomon@google.com
BUG=

Review URL: https://codereview.chromium.org/467293002

Cr-Commit-Position: refs/heads/master@{#289339}
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@289339 0039d316-1c4b-4281-b951-d872f2087c98

DEPS

@@ -46,7 +46,7 @@ vars = {
   "lss_revision": "31",
   "sfntly_revision": "239",
   "lighttpd_revision": "33737",
-  "skia_revision": "b2721f7372652496e1b1ec722883904caa8134a8",
+  "skia_revision": "fbd3576a18799da88988ef26fa9bce09e8ebba37",
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling Skia
   # and V8 without interference from each other.