Enable RGBA_4444 in GpuRasterBufferProvider

cc/raster/gpu_raster_buffer_provider.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_RASTER_GPU_RASTER_BUFFER_PROVIDER_H_
 #define CC_RASTER_GPU_RASTER_BUFFER_PROVIDER_H_
 
 #include <stdint.h>
 
 #include "base/macros.h"
 #include "cc/raster/raster_buffer_provider.h"
 #include "cc/resources/resource_provider.h"
 #include "gpu/command_buffer/common/sync_token.h"
 
 namespace cc {
 class ContextProvider;
 
 class CC_EXPORT GpuRasterBufferProvider : public RasterBufferProvider {
  public:
   GpuRasterBufferProvider(ContextProvider* compositor_context_provider,
                           ContextProvider* worker_context_provider,
                           ResourceProvider* resource_provider,
                           bool use_distance_field_text,
                           int gpu_rasterization_msaa_sample_count,
+                          ResourceFormat preferred_tile_format,
                           bool async_worker_context_enabled);
   ~GpuRasterBufferProvider() override;
 
   // Overridden from RasterBufferProvider:
   std::unique_ptr<RasterBuffer> AcquireBufferForRaster(
       const Resource* resource,
       uint64_t resource_content_id,
       uint64_t previous_content_id) override;
   void ReleaseBufferForRaster(std::unique_ptr<RasterBuffer> buffer) override;
   void OrderingBarrier() override;
@@ skipping 49 matching lines @@
     gpu::SyncToken sync_token_;
 
     DISALLOW_COPY_AND_ASSIGN(RasterBufferImpl);
   };
 
   ContextProvider* const compositor_context_provider_;
   ContextProvider* const worker_context_provider_;
   ResourceProvider* const resource_provider_;
   const bool use_distance_field_text_;
   const int msaa_sample_count_;
+  const ResourceFormat preferred_tile_format_;
   const bool async_worker_context_enabled_;
 
   std::set<RasterBufferImpl*> pending_raster_buffers_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuRasterBufferProvider);
 };
 
 }  // namespace cc
 
 #endif  // CC_RASTER_GPU_RASTER_BUFFER_PROVIDER_H_