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

chrome/browser/extensions/extension_messages_apitest.cc

Index: chrome/browser/extensions/extension_messages_apitest.cc
diff --git a/chrome/browser/extensions/extension_messages_apitest.cc b/chrome/browser/extensions/extension_messages_apitest.cc
index e2a605c2a44c83788028cf585a0825ff1ffe6936..d561dfab19db743a222f4f1789a9f455aca21a52 100644
--- a/chrome/browser/extensions/extension_messages_apitest.cc
+++ b/chrome/browser/extensions/extension_messages_apitest.cc
@@ -36,18 +36,19 @@ class MessageSender : public content::NotificationObserver {
   }
 
  private:
-  static scoped_ptr<ListValue> BuildEventArguments(const bool last_message,
-                                                   const std::string& data) {
+  static scoped_ptr<base::ListValue> BuildEventArguments(
+      const bool last_message,
+      const std::string& data) {
     DictionaryValue* event = new DictionaryValue();
     event->SetBoolean("lastMessage", last_message);
     event->SetString("data", data);
-    scoped_ptr<ListValue> arguments(new ListValue());
+    scoped_ptr<base::ListValue> arguments(new base::ListValue());
     arguments->Append(event);
     return arguments.Pass();
   }
 
   static scoped_ptr<extensions::Event> BuildEvent(
-      scoped_ptr<ListValue> event_args,
+      scoped_ptr<base::ListValue> event_args,
       Profile* profile,
       GURL event_url) {
     scoped_ptr<extensions::Event> event(new extensions::Event(