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

sync/internal_api/public/engine/model_safe_worker.cc

Index: sync/internal_api/public/engine/model_safe_worker.cc
diff --git a/sync/internal_api/public/engine/model_safe_worker.cc b/sync/internal_api/public/engine/model_safe_worker.cc
index a4d142b4b3c85950cd6d3d1ae0e9d48149cf1bb1..44e0a24655875cbc97aa9091b24ca488cbf96cd5 100644
--- a/sync/internal_api/public/engine/model_safe_worker.cc
+++ b/sync/internal_api/public/engine/model_safe_worker.cc
@@ -23,7 +23,8 @@ base::DictionaryValue* ModelSafeRoutingInfoToValue(
 
 std::string ModelSafeRoutingInfoToString(
     const ModelSafeRoutingInfo& routing_info) {
-  scoped_ptr<DictionaryValue> dict(ModelSafeRoutingInfoToValue(routing_info));
+  scoped_ptr<base::DictionaryValue> dict(
+      ModelSafeRoutingInfoToValue(routing_info));
   std::string json;
   base::JSONWriter::Write(dict.get(), &json);
   return json;