Convert most of extensions and some other random stuff to using the base namespace for Values.

sync/internal_api/sync_manager_impl.h

Index: sync/internal_api/sync_manager_impl.h
diff --git a/sync/internal_api/sync_manager_impl.h b/sync/internal_api/sync_manager_impl.h
index a916b30af71b2c26eeaf54103c25cdc7f610f631..12636fe9ac14e5511888e6ce56e1ed8d45c943a7 100644
--- a/sync/internal_api/sync_manager_impl.h
+++ b/sync/internal_api/sync_manager_impl.h
@@ -212,7 +212,7 @@ class SYNC_EXPORT_PRIVATE SyncManagerImpl :
     std::string payload;
 
     // Returned pointer owned by the caller.
-    DictionaryValue* ToValue() const;
+    base::DictionaryValue* ToValue() const;
   };
 
   base::TimeDelta GetNudgeDelayTimeDelta(const ModelType& model_type);
@@ -279,7 +279,7 @@ class SYNC_EXPORT_PRIVATE SyncManagerImpl :
     const std::string& name, UnboundJsMessageHandler unbound_message_handler);
 
   // Returned pointer is owned by the caller.
-  static DictionaryValue* NotificationInfoToValue(
+  static base::DictionaryValue* NotificationInfoToValue(
       const NotificationInfoMap& notification_info);
 
   static std::string NotificationInfoToString(