ui/compositor: move the browser compositor thread to the ContextFactory

ui/compositor/test/in_process_context_factory.h

Index: ui/compositor/test/in_process_context_factory.h
diff --git a/ui/compositor/test/in_process_context_factory.h b/ui/compositor/test/in_process_context_factory.h
index 5c7cf8b890be7259ccdc15c5313f5aca23562f90..117972937559f4f962d7037934ad659113e6e7d6 100644
--- a/ui/compositor/test/in_process_context_factory.h
+++ b/ui/compositor/test/in_process_context_factory.h
@@ -7,6 +7,10 @@
 
 #include "ui/compositor/compositor.h"
 
+namespace base {
+class Thread;
+}
+
 namespace webkit {
 namespace gpu {
 class ContextProviderInProcess;
@@ -35,8 +39,10 @@ class InProcessContextFactory : public ContextFactory {
   virtual void RemoveCompositor(Compositor* compositor) OVERRIDE;
   virtual bool DoesCreateTestContexts() OVERRIDE;
   virtual cc::SharedBitmapManager* GetSharedBitmapManager() OVERRIDE;
+  virtual base::MessageLoopProxy* GetCompositorMessageLoop() OVERRIDE;
 
  private:
+  scoped_ptr<base::Thread> compositor_thread_;
   scoped_refptr<webkit::gpu::ContextProviderInProcess>
       shared_main_thread_contexts_;
   scoped_ptr<cc::SharedBitmapManager> shared_bitmap_manager_;