Mac Overlays: Allow sandwich strategy to emit multiple overlays

Mac Overlays: Allow sandwich strategy to emit multiple overlays

Cut the region of the overlay candidate into rects and emit a quad and overlay
for each rect. This helps with situations where there are logos or controls in the
corners of a video (which then cause a huge top overlay).

BUG=522627
CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel

Committed: https://crrev.com/09cc645bc3efbd964e2af2d5700413556edeaeed
Cr-Commit-Position: refs/heads/master@{#346816}

[ccameron, 2015-08-31 23:16:58]

ccameron@chromium.org changed reviewers:
+ alexst@chromium.org

[ccameron, 2015-09-01 01:44:49]

More tweaks, ptal

[ccameron, 2015-09-01 22:08:25]

ping

[alexst (slow to review), 2015-09-01 22:32:12]

On 2015/09/01 22:08:25, ccameron wrote:
> ping

woops, thanks for the ping, it slipped by. makes sense, lgtm.

[ccameron, 2015-09-01 23:47:16]

Thanks!

[ccameron, 2015-09-01 23:49:20]

The CQ bit was checked by ccameron@chromium.org

[ccameron, 2015-09-01 23:49:21]

The patchset sent to the CQ was uploaded after l-g-t-m from alexst@chromium.org
Link to the patchset: https://codereview.chromium.org/1315053004/#ps40001
(title: "Remove false dependency")

[commit-bot: I haz the power, 2015-09-01 23:49:52]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1315053004/40001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1315053004/40001

[commit-bot: I haz the power, 2015-09-02 01:27:58]

Committed patchset #3 (id:40001)

[commit-bot: I haz the power, 2015-09-02 01:28:43]

Patchset 3 (id:??) landed as
https://crrev.com/09cc645bc3efbd964e2af2d5700413556edeaeed
Cr-Commit-Position: refs/heads/master@{#346816}