Skia roll 5c4b137:5a246bb

https://skia.googlesource.com/skia/+log/5c4b137592a7937b4d02d72a976fa783f8d3675a..5a246bb48708cfdbf5b63f8df7e2b09b3704cae4

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

Review URL: https://codereview.chromium.org/469573003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@289908 0039d316-1c4b-4281-b951-d872f2087c98

DEPS

@@ -46,7 +46,7 @@ vars = {
   "lss_revision": "31",
   "sfntly_revision": "239",
   "lighttpd_revision": "33737",
-  "skia_revision": "5c4b137592a7937b4d02d72a976fa783f8d3675a",
+  "skia_revision": "5a246bb48708cfdbf5b63f8df7e2b09b3704cae4",
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling Skia
   # and V8 without interference from each other.