Mac: Add partial swap support to NSOpenGLContext path

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 <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 "content/common/content_export.h"
 #include "content/common/message_router.h"
 #include "content/public/common/gpu_memory_stats.h"
 #include "gpu/config/gpu_info.h"
 #include "ipc/ipc_listener.h"
 #include "ipc/ipc_sender.h"
 
+#if defined(OS_MACOSX)
 struct GpuHostMsg_AcceleratedSurfaceBuffersSwapped_Params;
+#endif
 
 namespace ui {
 struct LatencyInfo;
 }
 
 namespace gfx {
 class Size;
 }
 
 namespace IPC {
@@ skipping 45 matching lines @@
 
   // Message handlers.
   bool OnControlMessageReceived(const IPC::Message& message);
 
   void OnLogMessage(int level, const std::string& header,
       const std::string& message);
 
   void OnGraphicsInfoCollected(const gpu::GPUInfo& gpu_info);
 
   void OnAcceleratedSurfaceInitialized(int32 surface_id, int32 route_id);
+#if defined(OS_MACOSX)
   void OnAcceleratedSurfaceBuffersSwapped(
       const GpuHostMsg_AcceleratedSurfaceBuffersSwapped_Params& params);
+#endif
   void OnVideoMemoryUsageStatsReceived(
       const GPUVideoMemoryUsageStats& video_memory_usage_stats);
   void OnResourcesRelinquished();
   void OnAddSubscription(int32 process_id, unsigned int target);
   void OnRemoveSubscription(int32 process_id, unsigned int target);
 
   // The serial number of the GpuProcessHost / GpuProcessHostUIShim pair.
   int host_id_;
   base::Closure relinquish_callback_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_GPU_GPU_PROCESS_HOST_UI_SHIM_H_