cc: Remove the unused compositor thread variable and interface.

content/browser/compositor/gpu_process_transport_factory.h

Index: content/browser/compositor/gpu_process_transport_factory.h
diff --git a/content/browser/compositor/gpu_process_transport_factory.h b/content/browser/compositor/gpu_process_transport_factory.h
index 90c9f4dfec2b852acec7366f772edd70aaa57409..3f3d78bf4a33c73e4d4558f2da554279fcbe2cfb 100644
--- a/content/browser/compositor/gpu_process_transport_factory.h
+++ b/content/browser/compositor/gpu_process_transport_factory.h
@@ -54,7 +54,6 @@ class GpuProcessTransportFactory
   bool DoesCreateTestContexts() override;
   cc::SharedBitmapManager* GetSharedBitmapManager() override;
   gpu::GpuMemoryBufferManager* GetGpuMemoryBufferManager() override;
-  base::MessageLoopProxy* GetCompositorMessageLoop() override;
   scoped_ptr<cc::SurfaceIdAllocator> CreateSurfaceIdAllocator() override;
   void ResizeDisplay(ui::Compositor* compositor,
                      const gfx::Size& size) override;
@@ -86,7 +85,6 @@ class GpuProcessTransportFactory
   void OnLostMainThreadSharedContext();
 
   typedef std::map<ui::Compositor*, PerCompositorData*> PerCompositorDataMap;
-  scoped_ptr<base::Thread> compositor_thread_;
   PerCompositorDataMap per_compositor_data_;
   scoped_refptr<ContextProviderCommandBuffer> shared_main_thread_contexts_;
   scoped_ptr<GLHelper> gl_helper_;