[Pepper GL] Use shared state to fix a memory leak in MapSub GL extension.

content/renderer/pepper/ppb_graphics_3d_impl.h

 // Copyright (c) 2012 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_RENDERER_PEPPER_PPB_GRAPHICS_3D_IMPL_H_
 #define CONTENT_RENDERER_PEPPER_PPB_GRAPHICS_3D_IMPL_H_
 
+#include "base/memory/shared_memory.h"
 #include "base/memory/weak_ptr.h"
 #include "gpu/command_buffer/common/mailbox.h"
 #include "ppapi/shared_impl/ppb_graphics_3d_shared.h"
 #include "ppapi/shared_impl/resource.h"
 
 namespace content {
 class CommandBufferProxyImpl;
 class GpuChannelHost;
 
 class PPB_Graphics3D_Impl : public ppapi::PPB_Graphics3D_Shared {
  public:
   static PP_Resource Create(PP_Instance instance,
                             PP_Resource share_context,
                             const int32_t* attrib_list);
-  static PP_Resource CreateRaw(PP_Instance instance,
-                               PP_Resource share_context,
-                               const int32_t* attrib_list);
+  static PP_Resource CreateRaw(
+      PP_Instance instance,
+      PP_Resource share_context,
+      const int32_t* attrib_list,
+      base::SharedMemoryHandle* shared_state_handle);
 
   // PPB_Graphics3D_API trusted implementation.
   virtual PP_Bool SetGetBuffer(int32_t transfer_buffer_id) OVERRIDE;
   virtual scoped_refptr<gpu::Buffer> CreateTransferBuffer(uint32_t size,
                                                           int32* id) OVERRIDE;
   virtual PP_Bool DestroyTransferBuffer(int32_t id) OVERRIDE;
   virtual PP_Bool Flush(int32_t put_offset) OVERRIDE;
   virtual gpu::CommandBuffer::State WaitForTokenInRange(int32_t start,
                                                         int32_t end) OVERRIDE;
   virtual gpu::CommandBuffer::State WaitForGetOffsetInRange(int32_t start,
@@ skipping 28 matching lines @@
   virtual ~PPB_Graphics3D_Impl();
   // ppapi::PPB_Graphics3D_Shared overrides.
   virtual gpu::CommandBuffer* GetCommandBuffer() OVERRIDE;
   virtual gpu::GpuControl* GetGpuControl() OVERRIDE;
   virtual int32 DoSwapBuffers() OVERRIDE;
 
  private:
   explicit PPB_Graphics3D_Impl(PP_Instance instance);
 
   bool Init(PPB_Graphics3D_API* share_context, const int32_t* attrib_list);
-  bool InitRaw(PPB_Graphics3D_API* share_context, const int32_t* attrib_list);
+  bool InitRaw(PPB_Graphics3D_API* share_context,
+               const int32_t* attrib_list,
+               base::SharedMemoryHandle* shared_state_handle);
 
   // Notifications received from the GPU process.
   void OnSwapBuffers();
   void OnContextLost();
   void OnConsoleMessage(const std::string& msg, int id);
   // Notifications sent to plugin.
   void SendContextLost();
 
   // True if context is bound to instance.
   bool bound_to_instance_;
   // True when waiting for compositor to commit our backing texture.
   bool commit_pending_;
 
   gpu::Mailbox mailbox_;
   uint32 sync_point_;
   bool has_alpha_;
   scoped_refptr<GpuChannelHost> channel_;
   CommandBufferProxyImpl* command_buffer_;
 
   base::WeakPtrFactory<PPB_Graphics3D_Impl> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PPB_Graphics3D_Impl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_PEPPER_PPB_GRAPHICS_3D_IMPL_H_