Roll src/third_party/skia 8a3760f:13391dd

Roll src/third_party/skia 8a3760f:13391dd

Summary of changes available at:
https://chromium.googlesource.com/skia/+log/8a3760f..13391dd

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

Commits in this roll:
13391dd robertphillips@google.com Minor cleanup of clip mask manager

Committed: https://crrev.com/92ca4cc2934c73e49ba5e9c3d0d9dd242104778c
Cr-Commit-Position: refs/heads/master@{#357092}

[skia-deps-roller, 2015-10-30 12:16:00]

The CQ bit was checked by skia-deps-roller@chromium.org

[skia-deps-roller, 2015-10-30 12:16:02]

This roll was created by the Blink AutoRollBot.
    http://www.chromium.org/blink/blinkrollbot

[commit-bot: I haz the power, 2015-10-30 12:16:15]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1408033009/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1408033009/1

[commit-bot: I haz the power, 2015-10-30 13:53:42]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-10-30 13:54:33]

Patchset 1 (id:??) landed as
https://crrev.com/92ca4cc2934c73e49ba5e9c3d0d9dd242104778c
Cr-Commit-Position: refs/heads/master@{#357092}