Allow the renderer process to map textures from one context into another.

gpu/command_buffer/service/gpu_scheduler.h

 // Copyright (c) 2011 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 GPU_COMMAND_BUFFER_SERVICE_GPU_SCHEDULER_H_
 #define GPU_COMMAND_BUFFER_SERVICE_GPU_SCHEDULER_H_
 
 #include <map>
 #include <queue>
 #include <vector>
 
 #include "base/callback.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/shared_memory.h"
 #include "base/task.h"
 #include "gpu/command_buffer/common/command_buffer.h"
+#include "gpu/command_buffer/common/constants.h"
 #include "gpu/command_buffer/service/cmd_buffer_engine.h"
 #include "gpu/command_buffer/service/cmd_parser.h"
 #include "gpu/command_buffer/service/gles2_cmd_decoder.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/gfx/size.h"
 #include "ui/gfx/surface/transport_dib.h"
 
 #if defined(OS_MACOSX)
 #include "ui/gfx/surface/accelerated_surface_mac.h"
 #endif
@@ skipping 40 matching lines @@
       const scoped_refptr<gfx::GLSurface>& surface,
       const scoped_refptr<gfx::GLContext>& context,
       const gfx::Size& size,
       const gles2::DisallowedExtensions& disallowed_extensions,
       const char* allowed_extensions,
       const std::vector<int32>& attribs);
 
   void Destroy();
   void DestroyCommon();
 
+  bool MapExternalResource(resource_type::ResourceType resource_type,
+                           uint32 resource_source_id,
+                           GpuScheduler* source_scheduler,
+                           uint32 resource_dest_id);
+
   bool SetParent(GpuScheduler* parent_scheduler, uint32 parent_texture_id);
 
   void PutChanged();
 
   // Sets whether commands should be processed by this scheduler. Setting to
   // false unschedules. Setting to true reschedules. Whether or not the
   // scheduler is currently scheduled is "reference counted". Every call with
   // false must eventually be paired by a call with true.
   void SetScheduled(bool is_scheduled);
 
@@ skipping 88 matching lines @@
 #endif
 
   ScopedRunnableMethodFactory<GpuScheduler> method_factory_;
   scoped_ptr<Callback0::Type> wrapped_swap_buffers_callback_;
   scoped_ptr<Callback0::Type> command_processed_callback_;
 };
 
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_GPU_SCHEDULER_H_