Updated OSX to blacklist multisampling when multiple monitors are connected

content/public/browser/gpu_data_manager_observer.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_PUBLIC_BROWSER_GPU_DATA_MANAGER_OBSERVER_H_
 #define CONTENT_PUBLIC_BROWSER_GPU_DATA_MANAGER_OBSERVER_H_
 
 #include "base/process_util.h"
 #include "content/common/content_export.h"
 #include "content/public/common/gpu_memory_stats.h"
 #include "content/public/common/three_d_api_types.h"
 
 class GURL;
 
 namespace content {
 
 // Observers can register themselves via GpuDataManager::AddObserver, and
 // can un-register with GpuDataManager::RemoveObserver.
-class GpuDataManagerObserver {
+class CONTENT_EXPORT GpuDataManagerObserver {
  public:
   // Called for any observers whenever there is a GPU info update.
   virtual void OnGpuInfoUpdate() {}
 
   // Called for any observers whenever there is a GPU video memory update.
   virtual void OnVideoMemoryUsageStatsUpdate(
       const GPUVideoMemoryUsageStats& video_memory_usage_stats) {}
 
   // Indicates that client 3D APIs (Pepper 3D, WebGL) were just blocked on the
   // given page, specifically because the GPU was reset recently.
   virtual void DidBlock3DAPIs(const GURL& url,
                               int render_process_id,
                               int render_view_id,
                               ThreeDAPIType requester) {}
 
   // Called for any observer when the GPU process crashed.
   virtual void OnGpuProcessCrashed(base::TerminationStatus exit_code) {}
 
   // Called for any observer when the system switches to a different GPU.
   virtual void OnGpuSwitching() {}
 
  protected:
   virtual ~GpuDataManagerObserver() {}
 };
 
 };  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_GPU_DATA_MANAGER_OBSERVER_H_