Revert of Avoid Copying damage rect when using Overlays

Revert of Avoid Copying damage rect when using Overlays (patchset #12 id:220001 of https://codereview.chromium.org/1330563004/ )

Reason for revert:
The reason for revert:

use-of-uninitiailzed value is reported on msan bot.

Filed crbug.com/548452

[ RUN      ] SandwichTest.MultiQuadOverlay
==7008==WARNING: MemorySanitizer: use-of-uninitialized-value
    #0 0x7f1d2774a400 in cc::OverlayProcessor::ProcessForOverlays(cc::ResourceProvider*, cc::ScopedPtrVector\u003Ccc::RenderPass>*, std::__1::vector\u003Ccc::OverlayCandidate, std::__1::allocator\u003Ccc::OverlayCandidate> >*, gfx::Rect*) cc/output/overlay_processor.cc:45:13
    #1 0x7f1d259f6e5e in cc::(anonymous namespace)::SandwichTest_MultiQuadOverlay_Test::TestBody() cc/output/overlay_unittest.cc:617:3
    #2 0x7f1d274a3922 in HandleExceptionsInMethodIfSupported\u003Ctesting::Test, void> testing/gtest/src/gtest.cc:2458:12

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
> CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel
>
> Committed: https://crrev.com/2904998edff0cfcaab43eeb3b1db013d6169bd17
> Cr-Commit-Position: refs/heads/master@{#356352}

TBR=alexst@chromium.org,achaulk@chromium.org,danakj@chromium.org,ccameron@chromium.org,piman@chromium.org,kalyan.kondapally@intel.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=370522
Committed: https://crrev.com/6a01f994b36782395119772fc72cce1d74104db9
Cr-Commit-Position: refs/heads/master@{#356427}

[oshima, 2015-10-27 23:12:42]

Created Revert of Avoid Copying damage rect when using Overlays

[commit-bot: I haz the power, 2015-10-27 23:15:08]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1414923006/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1414923006/1

[commit-bot: I haz the power, 2015-10-27 23:18:34]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-10-27 23:19:57]

Patchset 1 (id:??) landed as
https://crrev.com/6a01f994b36782395119772fc72cce1d74104db9
Cr-Commit-Position: refs/heads/master@{#356427}