Make browser GPU channel creation async.

ui/compositor/test/in_process_context_factory.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_COMPOSITOR_TEST_IN_PROCESS_CONTEXT_FACTORY_H_
 #define UI_COMPOSITOR_TEST_IN_PROCESS_CONTEXT_FACTORY_H_
 
 #include "cc/test/test_gpu_memory_buffer_manager.h"
 #include "cc/test/test_shared_bitmap_manager.h"
 #include "ui/compositor/compositor.h"
 
 namespace base {
 class Thread;
 }
 
 namespace webkit {
 namespace gpu {
 class ContextProviderInProcess;
 }
 }
 
 namespace ui {
 
 class InProcessContextFactory : public ContextFactory {
  public:
   InProcessContextFactory();
   ~InProcessContextFactory() override;
 
   // ContextFactory implementation
-  scoped_ptr<cc::OutputSurface> CreateOutputSurface(
-      Compositor* compositor,
-      bool software_fallback) override;
+  void CreateOutputSurface(base::WeakPtr<Compositor> compositor,
+                           bool software_fallback) override;
 
   scoped_refptr<Reflector> CreateReflector(Compositor* mirrored_compositor,
                                            Layer* mirroring_layer) override;
   void RemoveReflector(scoped_refptr<Reflector> reflector) override;
 
   scoped_refptr<cc::ContextProvider> SharedMainThreadContextProvider() override;
   void RemoveCompositor(Compositor* compositor) override;
   bool DoesCreateTestContexts() override;
   cc::SharedBitmapManager* GetSharedBitmapManager() override;
   cc::GpuMemoryBufferManager* GetGpuMemoryBufferManager() override;
   base::MessageLoopProxy* GetCompositorMessageLoop() override;
   scoped_ptr<cc::SurfaceIdAllocator> CreateSurfaceIdAllocator() override;
 
  private:
   scoped_ptr<base::Thread> compositor_thread_;
   scoped_refptr<webkit::gpu::ContextProviderInProcess>
       shared_main_thread_contexts_;
   cc::TestSharedBitmapManager shared_bitmap_manager_;
   cc::TestGpuMemoryBufferManager gpu_memory_buffer_manager_;
   uint32_t next_surface_id_namespace_;
 
   DISALLOW_COPY_AND_ASSIGN(InProcessContextFactory);
 };
 
 }  // namespace ui
 
 #endif  // UI_COMPOSITOR_TEST_IN_PROCESS_CONTEXT_FACTORY_H_