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

chrome/browser/extensions/extension_service_unittest.cc

Index: chrome/browser/extensions/extension_service_unittest.cc
diff --git a/chrome/browser/extensions/extension_service_unittest.cc b/chrome/browser/extensions/extension_service_unittest.cc
index 89f9a781bda484f7fb7ae12cfc55af2c5300ee88..b3087cab0c5b00a04fe7667a0b576e0905a307a1 100644
--- a/chrome/browser/extensions/extension_service_unittest.cc
+++ b/chrome/browser/extensions/extension_service_unittest.cc
@@ -116,6 +116,9 @@
 #include "chrome/browser/chromeos/settings/device_settings_service.h"
 #endif
 
+using base::DictionaryValue;
+using base::ListValue;
+using base::Value;
 using content::BrowserContext;
 using content::BrowserThread;
 using content::DOMStorageContext;