Merge crbug.com/232556 to M28 branch (1500).

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"
@@ skipping 17 matching lines @@
   // 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_