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

chrome/browser/extensions/event_listener_map_unittest.cc

Index: chrome/browser/extensions/event_listener_map_unittest.cc
diff --git a/chrome/browser/extensions/event_listener_map_unittest.cc b/chrome/browser/extensions/event_listener_map_unittest.cc
index da4eb243638e05972fd246599742695fb724774c..d1b657f2e9b092f11eb024f5d46c187c6aa75daf 100644
--- a/chrome/browser/extensions/event_listener_map_unittest.cc
+++ b/chrome/browser/extensions/event_listener_map_unittest.cc
@@ -9,6 +9,10 @@
 #include "content/public/test/mock_render_process_host.h"
 #include "content/public/test/test_browser_context.h"
 
+using base::DictionaryValue;
+using base::ListValue;
+using base::StringValue;
+
 namespace extensions {
 
 namespace {