Re-land: cc: Use worker context for one-copy tile initialization.

cc/test/layer_tree_pixel_resource_test.cc

Index: cc/test/layer_tree_pixel_resource_test.cc
diff --git a/cc/test/layer_tree_pixel_resource_test.cc b/cc/test/layer_tree_pixel_resource_test.cc
index bc323f138dc2b6368a502b8b7051956e47527bc4..0a9ab94c3b435700bf1bc63a37b152eb726342d7 100644
--- a/cc/test/layer_tree_pixel_resource_test.cc
+++ b/cc/test/layer_tree_pixel_resource_test.cc
@@ -127,8 +127,7 @@ void LayerTreeHostPixelResourceTest::InitializeFromTestCase(
 void LayerTreeHostPixelResourceTest::CreateResourceAndTileTaskWorkerPool(
     LayerTreeHostImpl* host_impl,
     scoped_ptr<TileTaskWorkerPool>* tile_task_worker_pool,
-    scoped_ptr<ResourcePool>* resource_pool,
-    scoped_ptr<ResourcePool>* staging_resource_pool) {
+    scoped_ptr<ResourcePool>* resource_pool) {
   base::SingleThreadTaskRunner* task_runner =
       proxy()->HasImplThread() ? proxy()->ImplThreadTaskRunner()
                                : proxy()->MainThreadTaskRunner();
@@ -177,15 +176,12 @@ void LayerTreeHostPixelResourceTest::CreateResourceAndTileTaskWorkerPool(
       EXPECT_TRUE(context_provider);
       EXPECT_EQ(PIXEL_TEST_GL, test_type_);
       EXPECT_TRUE(host_impl->GetRendererCapabilities().using_image);
-      // We need to create a staging resource pool when using copy rasterizer.
-      *staging_resource_pool =
-          ResourcePool::Create(resource_provider, staging_texture_target_);
       *resource_pool =
           ResourcePool::Create(resource_provider, draw_texture_target_);
 
       *tile_task_worker_pool = OneCopyTileTaskWorkerPool::Create(
           task_runner, task_graph_runner(), context_provider, resource_provider,
-          staging_resource_pool->get(), max_bytes_per_copy_operation, false);
+          max_bytes_per_copy_operation, false, staging_texture_target_);
       break;
     case PIXEL_BUFFER_TILE_TASK_WORKER_POOL:
       EXPECT_TRUE(context_provider);