Provide shared context to Platform API in renderer.

webkit/gpu/context_provider_in_process.h

 // Copyright (c) 2013 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 WEBKIT_GPU_CONTEXT_PROVIDER_IN_PROCESS_H_
 #define WEBKIT_GPU_CONTEXT_PROVIDER_IN_PROCESS_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "base/synchronization/lock.h"
 #include "cc/context_provider.h"
 
 namespace webkit {
 namespace gpu {
 class GrContextForWebGraphicsContext3D;
 
 class ContextProviderInProcess : public cc::ContextProvider {
  public:
   enum InProcessType {
     IN_PROCESS,
     IN_PROCESS_COMMAND_BUFFER,
   };
   explicit ContextProviderInProcess(InProcessType type);
 
   virtual bool InitializeOnMainThread() OVERRIDE;
   virtual bool BindToCurrentThread() OVERRIDE;
   virtual WebKit::WebGraphicsContext3D* Context3d() OVERRIDE;
   virtual class GrContext* GrContext() OVERRIDE;
   virtual void VerifyContexts() OVERRIDE;
-
-  bool DestroyedOnMainThread();
+  virtual bool DestroyedOnMainThread() OVERRIDE;
 
  protected:
   virtual ~ContextProviderInProcess();
 
   scoped_ptr<WebKit::WebGraphicsContext3D> CreateOffscreenContext3d();
 
   virtual void OnLostContext();
   virtual void OnMemoryAllocationChanged(bool nonzero_allocation);
 
  private:
   InProcessType type_;
   scoped_ptr<WebKit::WebGraphicsContext3D> context3d_;
   scoped_ptr<webkit::gpu::GrContextForWebGraphicsContext3D> gr_context_;
 
   base::Lock destroyed_lock_;
   bool destroyed_;
 
   class LostContextCallbackProxy;
   scoped_ptr<LostContextCallbackProxy> lost_context_callback_proxy_;
 
   class MemoryAllocationCallbackProxy;
   scoped_ptr<MemoryAllocationCallbackProxy> memory_allocation_callback_proxy_;
 };
 
 }  // namespace gpu
 }  // namespace webkit
 
 #endif  // WEBKIT_GPU_CONTEXT_PROVIDER_IN_PROCESS_H_