Roll src/third_party/skia d8aa7b7:2100c5e

Summary of changes available at:
https://chromium.googlesource.com/skia/+log/d8aa7b7..2100c5e

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

Review URL: https://codereview.chromium.org/689093002

Cr-Commit-Position: refs/heads/master@{#302266}

DEPS

@@ -44,7 +44,7 @@ vars = {
   'boringssl_git': 'https://boringssl.googlesource.com',
   'libvpx_revision': '2e5ced5fd62a73f4f5687ab19520b3aad1c53f6f',
   'sfntly_revision': '1bdaae8fc788a5ac8936d68bf24f37d977a13dac',
-  'skia_revision': 'd8aa7b74c8ef0cb8ed3f6b03beb7ee5013624372',
+  'skia_revision': '2100c5ed7a5e5470a04e7af7309d8bd3fc4249f7',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling Skia
   # and V8 without interference from each other.