Changing the Weakptr initialization order in chrome/browser/extension folder

chrome/browser/extensions/api/idle/idle_manager.h

Index: chrome/browser/extensions/api/idle/idle_manager.h
diff --git a/chrome/browser/extensions/api/idle/idle_manager.h b/chrome/browser/extensions/api/idle/idle_manager.h
index 4752917ecd840ff50946912ff73688c4ff39a498..29a9bd1dd2ffbb1f3e7655ae240e4a1bbcffe0c1 100644
--- a/chrome/browser/extensions/api/idle/idle_manager.h
+++ b/chrome/browser/extensions/api/idle/idle_manager.h
@@ -126,7 +126,6 @@ class IdleManager : public ExtensionRegistryObserver,
   MonitorMap monitors_;
 
   base::RepeatingTimer<IdleManager> poll_timer_;
-  base::WeakPtrFactory<IdleManager> weak_factory_;
 
   scoped_ptr<IdleTimeProvider> idle_time_provider_;
   scoped_ptr<EventDelegate> event_delegate_;
@@ -137,6 +136,8 @@ class IdleManager : public ExtensionRegistryObserver,
   ScopedObserver<ExtensionRegistry, ExtensionRegistryObserver>
       extension_registry_observer_;
 
+  base::WeakPtrFactory<IdleManager> weak_factory_;
+
   DISALLOW_COPY_AND_ASSIGN(IdleManager);
 };