Enable RGBA_4444 in GpuRasterBufferProvider

cc/resources/resource_provider.h

 // Copyright 2012 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_RESOURCE_PROVIDER_H_
 #define CC_RESOURCES_RESOURCE_PROVIDER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 91 matching lines @@
   ResourceFormat best_render_buffer_format() const {
     return settings_.best_render_buffer_format;
   }
   ResourceFormat YuvResourceFormat(int bits) const;
   bool use_sync_query() const { return settings_.use_sync_query; }
   gpu::GpuMemoryBufferManager* gpu_memory_buffer_manager() {
     return gpu_memory_buffer_manager_;
   }
   size_t num_resources() const { return resources_.size(); }
 
-  bool IsResourceFormatSupported(ResourceFormat format) const;
+  bool IsTextureFormatSupported(ResourceFormat format) const;
+
+  // Returns true if the provided |format| can be used as a render buffer.
+  // Note that render buffer support implies texture support.
+  bool IsRenderBufferFormatSupported(ResourceFormat format) const;
 
   // Checks whether a resource is in use by a consumer.
   bool InUseByConsumer(ResourceId id);
 
   bool IsLost(ResourceId id);
 
   void LoseResourceForTesting(ResourceId id);
   void EnableReadLockFencesForTesting(ResourceId id);
 
   // Producer interface.
@@ skipping 661 matching lines @@
   // Set of resource Ids that would like to be notified about promotion hints.
   ResourceIdSet wants_promotion_hints_set_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(ResourceProvider);
 };
 
 }  // namespace cc
 
 #endif  // CC_RESOURCES_RESOURCE_PROVIDER_H_