Fix Mac resize, delete more Mac code

content/browser/gpu/gpu_process_host_ui_shim.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_BROWSER_GPU_GPU_PROCESS_HOST_UI_SHIM_H_
 #define CONTENT_BROWSER_GPU_GPU_PROCESS_HOST_UI_SHIM_H_
 
 // This class lives on the UI thread and supports classes like the
 // BackingStoreProxy, which must live on the UI thread. The IO thread
 // portion of this class, the GpuProcessHost, is responsible for
@@ skipping 26 matching lines @@
 
 namespace IPC {
 class Message;
 }
 
 namespace gpu {
 struct VideoMemoryUsageStats;
 }
 
 namespace content {
-#if defined(OS_MACOSX)
-struct AcceleratedSurfaceBuffersSwappedParams;
-#endif
 void RouteToGpuProcessHostUIShimTask(int host_id, const IPC::Message& msg);
 
 class GpuProcessHostUIShim : public IPC::Listener,
                              public IPC::Sender,
                              public base::NonThreadSafe {
  public:
   // Create a GpuProcessHostUIShim with the given ID.  The object can be found
   // using FromID with the same id.
   static GpuProcessHostUIShim* Create(int host_id);
 
@@ skipping 40 matching lines @@
       const gpu::VideoMemoryUsageStats& video_memory_usage_stats);
 
   // The serial number of the GpuProcessHost / GpuProcessHostUIShim pair.
   int host_id_;
   base::Closure close_callback_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_GPU_GPU_PROCESS_HOST_UI_SHIM_H_