Revert of Avoid Copying damage rect when using Overlays

Revert of Avoid Copying damage rect when using Overlays (patchset #13 id:240001 of https://codereview.chromium.org/1330563004/ )

Reason for revert:
This broke YouTube on Mac, in particular the sandwich overlay strategy.
BUG=549350
Original issue's description:
> Avoid Copying damage rect when using Overlays
>
> When using Overlays, the damage rect can be completely covered by
> the layer being composited by Overlay. We still copy damage rect
> on to the current surface(Primary frame buffer) in BufferQueue. This
> should be un-necessary.
>
> BUG=370522, 548452
> CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel
>
> Committed: https://crrev.com/2904998edff0cfcaab43eeb3b1db013d6169bd17
> Cr-Commit-Position: refs/heads/master@{#356352}
>
> Committed: https://crrev.com/5ee13b006abdf74d0f6b3fbdde2d936c00ad97e7
> Cr-Commit-Position: refs/heads/master@{#356570}

TBR=alexst@chromium.org,achaulk@chromium.org,danakj@chromium.org,piman@chromium.org,kalyan.kondapally@intel.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=370522, 548452
Committed: https://crrev.com/f6a13431381bb070228b5af79e6fd537251c647b
Cr-Commit-Position: refs/heads/master@{#357224}

[ccameron, 2015-10-30 23:30:29]

Created Revert of Avoid Copying damage rect when using Overlays

[commit-bot: I haz the power, 2015-10-30 23:33:25]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1408953005/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1408953005/1

[commit-bot: I haz the power, 2015-10-30 23:35:41]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-10-30 23:36:15]

Patchset 1 (id:??) landed as
https://crrev.com/f6a13431381bb070228b5af79e6fd537251c647b
Cr-Commit-Position: refs/heads/master@{#357224}