Add managed user lock/unlock button for the extensions page.

chrome/browser/managed_mode/managed_user_service.h

Index: chrome/browser/managed_mode/managed_user_service.h
diff --git a/chrome/browser/managed_mode/managed_user_service.h b/chrome/browser/managed_mode/managed_user_service.h
index 31fc53bc61c7eae059086115660973caa025b04a..bf8c20ff771f9d224fa910960869f5ea0ff3464d 100644
--- a/chrome/browser/managed_mode/managed_user_service.h
+++ b/chrome/browser/managed_mode/managed_user_service.h
@@ -39,6 +39,7 @@ class ManagedUserService : public ProfileKeyedService,
   virtual ~ManagedUserService();
 
   bool ProfileIsManaged() const;
+  bool IsElevated() const;
 
   static void RegisterUserPrefs(PrefRegistrySyncable* registry);
 
@@ -76,7 +77,7 @@ class ManagedUserService : public ProfileKeyedService,
   void SetManualBehaviorForURLs(const std::vector<GURL>& url,
                                 ManualBehavior behavior);
 
-  void SetElevatedForTesting(bool is_elevated);
+  void SetElevated(bool is_elevated);
 
   // Initializes this object. This method does nothing if the profile is not
   // managed.