content: Add command line flag for native GPU memory buffers.

content/browser/gpu/browser_gpu_channel_host_factory.h

 // Copyright (c) 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 CONTENT_BROWSER_GPU_BROWSER_GPU_CHANNEL_HOST_FACTORY_H_
 #define CONTENT_BROWSER_GPU_BROWSER_GPU_CHANNEL_HOST_FACTORY_H_
 
 #include <map>
 #include <vector>
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "content/common/gpu/client/gpu_channel_host.h"
 #include "content/common/gpu/client/gpu_memory_buffer_factory_host.h"
 #include "ipc/message_filter.h"
 
 namespace content {
 class BrowserGpuMemoryBufferManager;
 
 class CONTENT_EXPORT BrowserGpuChannelHostFactory
     : public GpuChannelHostFactory,
       public GpuMemoryBufferFactoryHost {
  public:
   static void Initialize(bool establish_gpu_channel);
   static void Terminate();
   static BrowserGpuChannelHostFactory* instance() { return instance_; }
 
+  static void EnableGpuMemoryBufferFactoryUsage(
+      gfx::GpuMemoryBuffer::Usage usage);
+  static bool IsGpuMemoryBufferFactoryUsageEnabled(
+      gfx::GpuMemoryBuffer::Usage usage);
+
   // Overridden from GpuChannelHostFactory:
   bool IsMainThread() override;
   base::MessageLoop* GetMainLoop() override;
   scoped_refptr<base::MessageLoopProxy> GetIOLoopProxy() override;
   scoped_ptr<base::SharedMemory> AllocateSharedMemory(size_t size) override;
   CreateCommandBufferResult CreateViewCommandBuffer(
       int32 surface_id,
       const GPUCreateCommandBufferConfig& init_params,
       int32 route_id) override;
 
@@ skipping 66 matching lines @@
   CreateGpuMemoryBufferCallbackMap create_gpu_memory_buffer_requests_;
 
   static BrowserGpuChannelHostFactory* instance_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserGpuChannelHostFactory);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_GPU_BROWSER_GPU_CHANNEL_HOST_FACTORY_H_