Remove code only used by Mac single threaded compositing.

content/test/test_render_view_host.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_TEST_TEST_RENDER_VIEW_HOST_H_
 #define CONTENT_TEST_TEST_RENDER_VIEW_HOST_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 127 matching lines @@
   virtual void AcceleratedSurfaceBuffersSwapped(
       const GpuHostMsg_AcceleratedSurfaceBuffersSwapped_Params& params,
       int gpu_host_id) OVERRIDE;
   virtual void AcceleratedSurfacePostSubBuffer(
       const GpuHostMsg_AcceleratedSurfacePostSubBuffer_Params& params,
       int gpu_host_id) OVERRIDE;
   virtual void AcceleratedSurfaceSuspend() OVERRIDE;
   virtual void AcceleratedSurfaceRelease() OVERRIDE {}
   virtual bool HasAcceleratedSurface(const gfx::Size& desired_size) OVERRIDE;
 #if defined(OS_MACOSX)
-  virtual void AboutToWaitForBackingStoreMsg() OVERRIDE;
   virtual bool PostProcessEventForPluginIme(
       const NativeWebKeyboardEvent& event) OVERRIDE;
 #elif defined(OS_ANDROID)
   virtual void ShowDisambiguationPopup(
       const gfx::Rect& target_rect,
       const SkBitmap& zoomed_bitmap) OVERRIDE {}
   virtual void HasTouchEventHandlers(bool need_touch_events) OVERRIDE {}
 #elif defined(OS_WIN) && !defined(USE_AURA)
   virtual void WillWmDestroy() OVERRIDE;
 #endif
@@ skipping 222 matching lines @@
  private:
   typedef scoped_ptr<ui::test::ScopedSetSupportedScaleFactors>
       ScopedSetSupportedScaleFactors;
   ScopedSetSupportedScaleFactors scoped_set_supported_scale_factors_;
   DISALLOW_COPY_AND_ASSIGN(RenderViewHostImplTestHarness);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_TEST_TEST_RENDER_VIEW_HOST_H_