Don't fire idle active event when listener re-added

chrome/browser/extensions/api/idle/idle_manager.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 CHROME_BROWSER_EXTENSIONS_API_IDLE_IDLE_MANAGER_H_
 #define CHROME_BROWSER_EXTENSIONS_API_IDLE_IDLE_MANAGER_H_
 
 #include <map>
 #include <string>
 
@@ skipping 85 matching lines @@
   void SetIdleTimeProviderForTest(scoped_ptr<IdleTimeProvider> idle_provider);
 
  private:
   FRIEND_TEST_ALL_PREFIXES(IdleTest, ActiveToIdle);
   FRIEND_TEST_ALL_PREFIXES(IdleTest, ActiveToLocked);
   FRIEND_TEST_ALL_PREFIXES(IdleTest, IdleToActive);
   FRIEND_TEST_ALL_PREFIXES(IdleTest, IdleToLocked);
   FRIEND_TEST_ALL_PREFIXES(IdleTest, LockedToActive);
   FRIEND_TEST_ALL_PREFIXES(IdleTest, LockedToIdle);
   FRIEND_TEST_ALL_PREFIXES(IdleTest, MultipleExtensions);
+  FRIEND_TEST_ALL_PREFIXES(IdleTest, ReAddListener);
   FRIEND_TEST_ALL_PREFIXES(IdleTest, SetDetectionInterval);
   FRIEND_TEST_ALL_PREFIXES(IdleTest, SetDetectionIntervalBeforeListener);
   FRIEND_TEST_ALL_PREFIXES(IdleTest, SetDetectionIntervalMaximum);
   FRIEND_TEST_ALL_PREFIXES(IdleTest, SetDetectionIntervalMinimum);
   FRIEND_TEST_ALL_PREFIXES(IdleTest, UnloadCleanup);
 
   typedef std::map<const std::string, IdleMonitor> MonitorMap;
 
   IdleMonitor* GetMonitor(const std::string& extension_id);
   void StartPolling();
@@ skipping 14 matching lines @@
   scoped_ptr<EventDelegate> event_delegate_;
 
   base::ThreadChecker thread_checker_;
 
   DISALLOW_COPY_AND_ASSIGN(IdleManager);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_IDLE_IDLE_MANAGER_H_