tree 7cd732148a55f882e1a0f857d0a81cb99faa9e96
parent deeaef61e84aaaf86dc2044afb476d935083fdc6
author vmpstr <vmpstr@chromium.org> 1409079112 -0700
committer Bo Liu <boliu@google.com> 1409097744 -0700

Cherry-pick: cc: Remove tiles from recycle tree that were deleted on active.

Cherry-pick with conflict of
crrev.com/7fceb77977afd9af22215eb9cd28ab667567668e

Conflicts:
	cc/debug/rasterize_and_record_benchmark_impl.cc
	cc/layers/picture_layer_impl_unittest.cc
	cc/resources/picture_layer_tiling.cc
	cc/resources/picture_layer_tiling_unittest.cc
	cc/test/fake_picture_layer_tiling_client.cc
	cc/test/fake_picture_layer_tiling_client.h

BUG: 16548433

Original description:

This patch removes tiles from the recycle tree that were deleted from
the active tree as a result of a shifting live tiles rect. It is
important to do this, since if the active tree then would recreate
the deleted tile (ie, live tiles rect shift back), we have to ensure
that this tile will be shared when the next pending tree is created.
If we don't do it, we can run into a situation in which we will
continuously raster the same tile.

The patch does the following:
- Adds a way to get a recycled tree twin tiling.
- During LiveTilesRect tile deletion, deletes tiles from the same
  location from the recycle twin (if one exists).

Change-Id: I295cec01b476a97f68b0678d9d4322568662040f