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

ui/ozone/gpu/gpu_memory_buffer_factory_ozone_native_buffer.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 UI_OZONE_GPU_GPU_MEMORY_BUFFER_FACTORY_OZONE_NATIVE_BUFFER_H_
 #define UI_OZONE_GPU_GPU_MEMORY_BUFFER_FACTORY_OZONE_NATIVE_BUFFER_H_
 
 #include <map>
 
 #include "base/memory/ref_counted.h"
@@ skipping 19 matching lines @@
   GpuMemoryBufferFactoryOzoneNativeBuffer();
   virtual ~GpuMemoryBufferFactoryOzoneNativeBuffer();
 
   // Creates a GPU memory buffer identified by |id|.
   // It can be called on any thread.
   bool CreateGpuMemoryBuffer(gfx::GpuMemoryBufferId id,
                              const gfx::Size& size,
                              gfx::GpuMemoryBuffer::Format format,
                              gfx::GpuMemoryBuffer::Usage usage,
                              int client_id,
-                             gfx::PluginWindowHandle surface_handle);
+                             gfx::PluginWindowHandle surface_handle,
+                             gfx::GpuMemoryBufferHandle* new_handle);

[reveman, 2015/05/11 16:40:57]

Please pass the handle as return value to be consistent with SharedMemory impl.

[dshwang, 2015/05/14 12:25:47]

Done. In addition, I remove all pointer passing code. all function this CL adds
return gfx::GpuMemoryBufferHandle.

 
   // Destroys GPU memory buffer identified by |id|.
   // It can be called on any thread.
   void DestroyGpuMemoryBuffer(gfx::GpuMemoryBufferId id, int client_id);
 
   // Creates a GLImage instance for GPU memory buffer identified by |id|.
   scoped_refptr<gfx::GLImage> CreateImageForGpuMemoryBuffer(
       gfx::GpuMemoryBufferId id,
       const gfx::Size& size,
       gfx::GpuMemoryBuffer::Format format,
       unsigned internalformat,
       int client_id);
 
   static scoped_refptr<gfx::GLImage> CreateImageForPixmap(
       scoped_refptr<NativePixmap> pixmap,
       const gfx::Size& size,
       gfx::GpuMemoryBuffer::Format format,
       unsigned internalformat);
 
  private:
   BufferToPixmapMap native_pixmap_map_;
   base::Lock native_pixmap_map_lock_;
 };
 
 }  // namespace ui
 
 #endif  // UI_OZONE_GPU_GPU_MEMORY_BUFFER_FACTORY_OZONE_NATIVE_BUFFER_H_