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

chrome/browser/extensions/api/storage/settings_sync_unittest.cc

Index: chrome/browser/extensions/api/storage/settings_sync_unittest.cc
diff --git a/chrome/browser/extensions/api/storage/settings_sync_unittest.cc b/chrome/browser/extensions/api/storage/settings_sync_unittest.cc
index ae4a3537a57cac67515476e6ff91eb90b4fed67b..81537aabd23b4d2f517707266397cf86d4bfe0ff 100644
--- a/chrome/browser/extensions/api/storage/settings_sync_unittest.cc
+++ b/chrome/browser/extensions/api/storage/settings_sync_unittest.cc
@@ -24,6 +24,9 @@
 #include "sync/api/sync_error_factory_mock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
+using base::DictionaryValue;
+using base::ListValue;
+using base::Value;
 using content::BrowserThread;
 
 namespace extensions {