cc, gpu: Use RGBA when using msaa on systems that don't support BGRA

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 <deque>
 #include <set>
 #include <string>
@@ skipping 78 matching lines @@
       bool use_persistent_map_for_gpu_memory_buffers);
   virtual ~ResourceProvider();
 
   void DidLoseOutputSurface() { lost_output_surface_ = true; }
 
   int max_texture_size() const { return max_texture_size_; }
   ResourceFormat memory_efficient_texture_format() const {
     return use_rgba_4444_texture_format_ ? RGBA_4444 : best_texture_format_;
   }
   ResourceFormat best_texture_format() const { return best_texture_format_; }
+  ResourceFormat best_render_buffer_format() const {
+    return best_render_buffer_format_;
+  }
   ResourceFormat yuv_resource_format() const { return yuv_resource_format_; }
   bool use_sync_query() const { return use_sync_query_; }
   bool use_persistent_map_for_gpu_memory_buffers() const {
     return use_persistent_map_for_gpu_memory_buffers_;
   }
   size_t num_resources() const { return resources_.size(); }
 
   // Checks whether a resource is in use by a consumer.
   bool InUseByConsumer(ResourceId id);
 
@@ skipping 485 matching lines @@
 
   ResourceType default_resource_type_;
   bool use_texture_storage_ext_;
   bool use_texture_format_bgra_;
   bool use_texture_usage_hint_;
   bool use_compressed_texture_etc1_;
   ResourceFormat yuv_resource_format_;
   scoped_ptr<TextureUploader> texture_uploader_;
   int max_texture_size_;
   ResourceFormat best_texture_format_;
+  ResourceFormat best_render_buffer_format_;
 
   base::ThreadChecker thread_checker_;
 
   scoped_refptr<Fence> current_read_lock_fence_;
   bool use_rgba_4444_texture_format_;
 
   const size_t id_allocation_chunk_size_;
   scoped_ptr<IdAllocator> texture_id_allocator_;
   scoped_ptr<IdAllocator> buffer_id_allocator_;
 
@@ skipping 56 matching lines @@
   return format_gl_data_format[format];
 }
 
 inline GLenum GLInternalFormat(ResourceFormat format) {
   return GLDataFormat(format);
 }
 
 }  // namespace cc
 
 #endif  // CC_RESOURCES_RESOURCE_PROVIDER_H_