Remove the default format from ResourcePool.

cc/test/layer_tree_pixel_resource_test.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CC_TEST_LAYER_TREE_PIXEL_RESOURCE_TEST_H_
 #define CC_TEST_LAYER_TREE_PIXEL_RESOURCE_TEST_H_
 
 #include "base/memory/ref_counted.h"
 #include "cc/test/layer_tree_pixel_test.h"
 
@@ skipping 19 matching lines @@
   GL_ASYNC_UPLOAD_2D_DRAW,
 };
 
 class LayerTreeHostPixelResourceTest : public LayerTreePixelTest {
  public:
   explicit LayerTreeHostPixelResourceTest(PixelResourceTestCase test_case);
   LayerTreeHostPixelResourceTest();
 
   scoped_ptr<Rasterizer> CreateRasterizer(
       LayerTreeHostImpl* host_impl) override;
-  void CreateResourceAndTileTaskWorkerPool(
+  ResourceFormat CreateResourceAndTileTaskWorkerPool(
       LayerTreeHostImpl* host_impl,
       scoped_ptr<TileTaskWorkerPool>* tile_task_worker_pool,
       scoped_ptr<ResourcePool>* resource_pool,
       scoped_ptr<ResourcePool>* staging_resource_pool) override;
 
   void RunPixelResourceTest(scoped_refptr<Layer> content_root,
                             base::FilePath file_name);
 
   enum TileTaskWorkerPoolOption {
     BITMAP_TILE_TASK_WORKER_POOL,
@@ skipping 32 matching lines @@
 class ParameterizedPixelResourceTest
     : public LayerTreeHostPixelResourceTest,
       public ::testing::WithParamInterface<PixelResourceTestCase> {
  public:
   ParameterizedPixelResourceTest();
 };
 
 }  // namespace cc
 
 #endif  // CC_TEST_LAYER_TREE_PIXEL_RESOURCE_TEST_H_