Revert of Re-land: cc: Use worker context for one-copy tile initialization. (patchset #29 id:560001 of https://codereview.chromium.org/1230203007/ )

Reason for revert:
Sorry Dave. I'm reverting as this broke mandoline. To see the breakage build mandoline:all, and run with:
mandoline --oopif-always-create-new-frame-tree http://phuang.github.io/iframe.html .

We do have mandoline tests that run, but they run with the code path  gfx::GLSurfaceTestSupport::InitializeOneOff(), which is why they likely still pass. I'll see about making the tests not run with that config.

Original issue's description:
> Re-land: cc: Use worker context for one-copy tile initialization.
>
> This moves management of staging resources to
> OneCopyTileTaskWorkerPool class. This makes it possible
> to use a worker context to issue and detect when copy
> operations complete.
>
> BUG=490295
> TBR=jamesr@chromium.org, sky@chromium.org
> CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel
>
> Committed: https://crrev.com/af0ab609b53c64ce43172be42e20e7ca8beab497
> Cr-Commit-Position: refs/heads/master@{#343947}

TBR=jamesr@chromium.org,kbr@chromium.org,piman@chromium.org,primiano@chromium.org,vmiura@chromium.org,vmpstr@chromium.org,reveman@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=490295

Review URL: https://codereview.chromium.org/1298143003

Cr-Commit-Position: refs/heads/master@{#344042}

1 files changed, 3 insertions, 1 deletions

diff --git a/cc/trees/layer_tree_host_impl.h b/cc/trees/layer_tree_host_impl.h
index 144ca92..893b42a 100644
--- a/cc/trees/layer_tree_host_impl.h
+++ b/cc/trees/layer_tree_host_impl.h
@@ -560,7 +560,8 @@ class CC_EXPORT LayerTreeHostImpl
 
   virtual void CreateResourceAndTileTaskWorkerPool(
       scoped_ptr<TileTaskWorkerPool>* tile_task_worker_pool,
-      scoped_ptr<ResourcePool>* resource_pool);
+      scoped_ptr<ResourcePool>* resource_pool,
+      scoped_ptr<ResourcePool>* staging_resource_pool);
 
   bool prepare_tiles_needed() const { return tile_priorities_dirty_; }
 
@@ -713,6 +714,7 @@ class CC_EXPORT LayerTreeHostImpl
   bool tree_resources_for_gpu_rasterization_dirty_;
   scoped_ptr<TileTaskWorkerPool> tile_task_worker_pool_;
   scoped_ptr<ResourcePool> resource_pool_;
+  scoped_ptr<ResourcePool> staging_resource_pool_;
   scoped_ptr<Renderer> renderer_;
 
   GlobalStateThatImpactsTilePriority global_tile_state_;