Remove the default format from ResourcePool.

cc/resources/gpu_rasterizer.h

 // Copyright 2015 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_RESOURCES_GPU_RASTERIZER_H_
 #define CC_RESOURCES_GPU_RASTERIZER_H_
 
 #include <vector>
 
 #include "cc/base/cc_export.h"
@@ skipping 12 matching lines @@
   ~GpuRasterizer() override;
 
   static scoped_ptr<GpuRasterizer> Create(ContextProvider* context_provider,
                                           ResourceProvider* resource_provider,
                                           bool use_distance_field_text,
                                           bool tile_prepare_enabled);
   PrepareTilesMode GetPrepareTilesMode() override;
   void RasterizeTiles(
       const TileVector& tiles,
       ResourcePool* resource_pool,
+      ResourceFormat resource_format,
       const UpdateTileDrawInfoCallback& update_tile_draw_info) override;
 
  private:
   GpuRasterizer(ContextProvider* context_provider,
                 ResourceProvider* resource_provider,
                 bool use_distance_filed_text,
                 bool tile_prepare_enabled);
 
   using ScopedResourceWriteLocks =
       ScopedPtrVector<ResourceProvider::ScopedWriteLockGr>;
@@ skipping 10 matching lines @@
 
   bool use_distance_field_text_;
   bool tile_prepare_enabled_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuRasterizer);
 };
 
 }  // namespace cc
 
 #endif  // CC_RESOURCES_GPU_RASTERIZER_H_