Move base/values.h into the base namespace.

chrome/common/json_pref_store.h

Index: chrome/common/json_pref_store.h
===================================================================
--- chrome/common/json_pref_store.h	(revision 91508)
+++ chrome/common/json_pref_store.h	(working copy)
@@ -16,13 +16,16 @@
 #include "chrome/common/persistent_pref_store.h"
 
 namespace base {
+class DictionaryValue;
 class MessageLoopProxy;
+class Value;
 }
 
-class DictionaryValue;
 class FilePath;
-class Value;
 
+using base::DictionaryValue;
+using base::Value;
+
 // A writable PrefStore implementation that is used for user preferences.
 class JsonPrefStore : public PersistentPrefStore,
                       public ImportantFileWriter::DataSerializer {