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

content/common/gpu/client/gpu_memory_buffer_impl.h

 // Copyright 2013 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_COMMON_GPU_CLIENT_GPU_MEMORY_BUFFER_IMPL_H_
 #define CONTENT_COMMON_GPU_CLIENT_GPU_MEMORY_BUFFER_IMPL_H_
 
+#include <string>
 #include <vector>
 
 #include "base/callback.h"
 #include "base/memory/scoped_ptr.h"
 #include "content/common/content_export.h"
 #include "ui/gfx/gpu_memory_buffer.h"
 #include "ui/gfx/size.h"
 
 namespace content {
 
 // Provides common implementation of a GPU memory buffer.
 class CONTENT_EXPORT GpuMemoryBufferImpl : public gfx::GpuMemoryBuffer {
  public:
   typedef base::Callback<void(scoped_ptr<GpuMemoryBufferImpl> buffer)>
       CreationCallback;
   typedef base::Callback<void(const gfx::GpuMemoryBufferHandle& handle)>
       AllocationCallback;
   typedef base::Callback<void(uint32 sync_point)> DestructionCallback;
 
   ~GpuMemoryBufferImpl() override;
 
+  // Gets the GPU memory buffer type with a given name.
+  static gfx::GpuMemoryBufferType GetNamedType(const std::string& name);
+
+  // Gets the name of a GPU memory buffer type.
+  static const char* GetTypeName(gfx::GpuMemoryBufferType type);
+
   // Gets system supported GPU memory buffer types. Preferred type at the front
   // of vector.
   static void GetSupportedTypes(std::vector<gfx::GpuMemoryBufferType>* types);
 
   // Sets the preferred GPU memory buffer type. This overrides the default
   // preferred type. Can only be called once prior to GetPreferredType().
   // Caller is responsible for correct ordering.
   static void SetPreferredType(gfx::GpuMemoryBufferType type);
 
   // Gets the preferred discardable memory type.
@@ skipping 73 matching lines @@
   bool mapped_;
   uint32 destruction_sync_point_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(GpuMemoryBufferImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_GPU_CLIENT_GPU_MEMORY_BUFFER_IMPL_H_