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

chrome/browser/extensions/api/context_menus/context_menus_api.cc

Index: chrome/browser/extensions/api/context_menus/context_menus_api.cc
diff --git a/chrome/browser/extensions/api/context_menus/context_menus_api.cc b/chrome/browser/extensions/api/context_menus/context_menus_api.cc
index df0e743b07456c0d0aeec85e6648a00af8576fda..de3053449ad580409baf49da8f218fa1c86231b9 100644
--- a/chrome/browser/extensions/api/context_menus/context_menus_api.cc
+++ b/chrome/browser/extensions/api/context_menus/context_menus_api.cc
@@ -166,7 +166,7 @@ bool ContextMenusCreateFunction::RunImpl() {
     }
 
     // The Generated Id is added by context_menus_custom_bindings.js.
-    DictionaryValue* properties = NULL;
+    base::DictionaryValue* properties = NULL;
     EXTENSION_FUNCTION_VALIDATE(args_->GetDictionary(0, &properties));
     EXTENSION_FUNCTION_VALIDATE(properties->GetInteger(kGeneratedIdKey,
                                                        &id.uid));