gpu: Associate all GpuMemoryBuffers with unique IDs.

content/common/gpu/gpu_memory_buffer_factory_surface_texture.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_GPU_MEMORY_BUFFER_FACTORY_SURFACE_TEXTURE_H_
 #define CONTENT_COMMON_GPU_GPU_MEMORY_BUFFER_FACTORY_SURFACE_TEXTURE_H_
 
 #include "base/containers/hash_tables.h"
 #include "base/memory/ref_counted.h"
 #include "ui/gfx/geometry/size.h"
 #include "ui/gfx/gpu_memory_buffer.h"
 
 namespace gfx {
 class GLImage;
 class SurfaceTexture;
 }
 
 namespace content {
 
 class GpuMemoryBufferFactorySurfaceTexture {
  public:
   GpuMemoryBufferFactorySurfaceTexture();
   ~GpuMemoryBufferFactorySurfaceTexture();
 
   // Creates a SurfaceTexture backed GPU memory buffer with |size| and
   // |internalformat|. A valid handle is returned on success.
-  gfx::GpuMemoryBufferHandle CreateGpuMemoryBuffer(
-      const gfx::GpuMemoryBufferId& id,
-      const gfx::Size& size,
-      unsigned internalformat);
+  gfx::GpuMemoryBufferHandle CreateGpuMemoryBuffer(gfx::GpuMemoryBufferId id,
+                                                   const gfx::Size& size,
+                                                   unsigned internalformat,
+                                                   int client_id);
 
   // Destroy a previously created GPU memory buffer.
-  void DestroyGpuMemoryBuffer(const gfx::GpuMemoryBufferId& id);
+  void DestroyGpuMemoryBuffer(gfx::GpuMemoryBufferId id, int client_id);
 
   // Creates a GLImage instance for a GPU memory buffer.
   scoped_refptr<gfx::GLImage> CreateImageForGpuMemoryBuffer(
-      const gfx::GpuMemoryBufferId& id,
+      gfx::GpuMemoryBufferId id,
       const gfx::Size& size,
-      unsigned internalformat);
+      unsigned internalformat,
+      int client_id);
 
  private:
   typedef std::pair<int, int> SurfaceTextureMapKey;
   typedef base::hash_map<SurfaceTextureMapKey,
                          scoped_refptr<gfx::SurfaceTexture>> SurfaceTextureMap;
   SurfaceTextureMap surface_textures_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_GPU_GPU_MEMORY_BUFFER_FACTORY_SURFACE_TEXTURE_H_