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      1 // Copyright 2013 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef CHROME_BROWSER_SYNC_GLUE_EXTENSIONS_ACTIVITY_MONITOR_H_
      6 #define CHROME_BROWSER_SYNC_GLUE_EXTENSIONS_ACTIVITY_MONITOR_H_
      7 
      8 #include "base/compiler_specific.h"
      9 #include "base/memory/ref_counted.h"
     10 #include "content/public/browser/notification_observer.h"
     11 #include "content/public/browser/notification_registrar.h"
     12 
     13 namespace syncer {
     14 class ExtensionsActivity;
     15 }
     16 
     17 namespace browser_sync {
     18 
     19 // Observe and record usage of extension bookmark API.
     20 class ExtensionsActivityMonitor : public content::NotificationObserver {
     21  public:
     22   ExtensionsActivityMonitor();
     23   virtual ~ExtensionsActivityMonitor();
     24 
     25   // content::NotificationObserver implementation.
     26   virtual void Observe(int type,
     27                        const content::NotificationSource& source,
     28                        const content::NotificationDetails& details) OVERRIDE;
     29 
     30   const scoped_refptr<syncer::ExtensionsActivity>& GetExtensionsActivity();
     31 
     32  private:
     33   scoped_refptr<syncer::ExtensionsActivity> extensions_activity_;
     34 
     35   // Used only on UI loop.
     36   content::NotificationRegistrar registrar_;
     37 };
     38 
     39 }  // namespace browser_sync
     40 
     41 #endif  // CHROME_BROWSER_SYNC_GLUE_EXTENSIONS_ACTIVITY_MONITOR_H_
     42