[Policy Experimental] Add "recommended" policies for URL exceptions.

components/prefs/pref_service.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.
 
 // This provides a way to access the application's current preferences.
 
 // Chromium settings and storage represent user-selected preferences and
 // information and MUST not be extracted, overwritten or modified except
 // through Chromium defined APIs.
 
@@ skipping 65 matching lines @@
     // browser.window_placement).
     const std::string name() const;
 
     // Returns the registered type of the preference.
     base::Value::Type GetType() const;
 
     // Returns the value of the Preference, falling back to the registered
     // default value if no other has been set.
     const base::Value* GetValue() const;
 
+    // Returns the value managed by the admin, if any.
+    const base::Value* GetManagedValue() const;
+
     // Returns the value recommended by the admin, if any.
     const base::Value* GetRecommendedValue() const;
 
     // Returns true if the Preference is managed, i.e. set by an admin policy.
     // Since managed prefs have the highest priority, this also indicates
     // whether the pref is actually being controlled by the policy setting.
     bool IsManaged() const;
 
     // Returns true if the Preference is controlled by the custodian of the
     // supervised user. Since a supervised user is not expected to have an admin
@@ skipping 283 matching lines @@
 
   // Local cache of registered Preference objects. The pref_registry_
   // is authoritative with respect to what the types and default values
   // of registered preferences are.
   mutable PreferenceMap prefs_map_;
 
   DISALLOW_COPY_AND_ASSIGN(PrefService);
 };
 
 #endif  // COMPONENTS_PREFS_PREF_SERVICE_H_