Missing overrides for Sinks in HWUI.

Missing overrides for Sinks in HWUI.

See crrev.com/1263113002

BUG=skia:4138
Committed: https://skia.googlesource.com/skia/+/f23190078b7139d63a639a8acfc21ddce183fd0a

[mtklein_C, 2015-08-03 17:01:57]

mtklein@chromium.org changed reviewers:
+ djsollen@google.com, reed@google.com

[mtklein, 2015-08-03 17:05:15]

The CQ bit was checked by mtklein@google.com to run a CQ dry run

[commit-bot: I haz the power, 2015-08-03 17:05:26]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1263143004/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1263143004/1

[commit-bot: I haz the power, 2015-08-03 17:13:40]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-08-03 17:13:40]

Dry run: This issue passed the CQ dry run.

[reed1, 2015-08-03 17:17:58]

lgtm

[mtklein, 2015-08-03 17:18:08]

The CQ bit was checked by mtklein@google.com

[commit-bot: I haz the power, 2015-08-03 17:18:30]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1263143004/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1263143004/1

[commit-bot: I haz the power, 2015-08-03 17:20:30]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/skia/+/f23190078b7139d63a639a8acfc21ddce183fd0a