content: Cleanup class/struct forward declarations

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
 // shuttling messages between the browser and GPU processes.
 
 #include <stdint.h>
 
 #include <string>
 
 #include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "base/memory/linked_ptr.h"
 #include "base/memory/ref_counted.h"
 #include "base/threading/non_thread_safe.h"
 #include "build/build_config.h"
 #include "content/common/content_export.h"
 #include "gpu/config/gpu_info.h"
 #include "gpu/ipc/common/memory_stats.h"
 #include "ipc/ipc_listener.h"
 #include "ipc/ipc_sender.h"
 #include "ipc/message_router.h"
 
-namespace ui {
-class LatencyInfo;
-}
-
-namespace gfx {
-class Size;
-}
-
 namespace IPC {
 class Message;
 }
 
 namespace gpu {
 struct VideoMemoryUsageStats;
 }
 
 namespace content {
 void RouteToGpuProcessHostUIShimTask(int host_id, const IPC::Message& msg);
@@ skipping 49 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_