ozone: Implement zero/one-copy texture for Ozone GBM.

content/common/gpu/client/gpu_memory_buffer_impl_ozone_native_pixmap.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 CONTENT_COMMON_GPU_CLIENT_GPU_MEMORY_BUFFER_IMPL_OZONE_NATIVE_PIXMAP_H_
 #define CONTENT_COMMON_GPU_CLIENT_GPU_MEMORY_BUFFER_IMPL_OZONE_NATIVE_PIXMAP_H_
 
 #include "content/common/gpu/client/gpu_memory_buffer_impl.h"
 
+namespace ui {
+
+class ClientNativePixmap;
+
+}  // namespace ui
+
 namespace content {
 
 // Implementation of GPU memory buffer based on Ozone native pixmap.
 class GpuMemoryBufferImplOzoneNativePixmap : public GpuMemoryBufferImpl {
  public:
   static scoped_ptr<GpuMemoryBufferImpl> CreateFromHandle(
       const gfx::GpuMemoryBufferHandle& handle,
       const gfx::Size& size,
       gfx::BufferFormat format,
       gfx::BufferUsage usage,
       const DestructionCallback& callback);
+  ~GpuMemoryBufferImplOzoneNativePixmap() override;
 
   // Overridden from gfx::GpuMemoryBuffer:
   bool Map(void** data) override;
   void Unmap() override;
   void GetStride(int* stride) const override;
   gfx::GpuMemoryBufferHandle GetHandle() const override;
 
  private:
   GpuMemoryBufferImplOzoneNativePixmap(gfx::GpuMemoryBufferId id,
                                        const gfx::Size& size,
                                        gfx::BufferFormat format,
+                                       gfx::BufferUsage usage,
                                        const DestructionCallback& callback);
-  ~GpuMemoryBufferImplOzoneNativePixmap() override;
+
+  bool Initialize(const gfx::GpuMemoryBufferHandle& handle);
+
+  scoped_ptr<ui::ClientNativePixmap> pixmap_;
+  gfx::BufferUsage usage_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuMemoryBufferImplOzoneNativePixmap);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_GPU_CLIENT_GPU_MEMORY_BUFFER_IMPL_OZONE_NATIVE_PIXMAP_H_