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

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

Index: chrome/browser/extensions/api/storage/settings_quota_unittest.cc
diff --git a/chrome/browser/extensions/api/storage/settings_quota_unittest.cc b/chrome/browser/extensions/api/storage/settings_quota_unittest.cc
index 8ed71e8d019b47d8faeb6eec25106486e4254bf5..0e4ea79ab8572e0999c9f7f4e2bdd5bd246daaa3 100644
--- a/chrome/browser/extensions/api/storage/settings_quota_unittest.cc
+++ b/chrome/browser/extensions/api/storage/settings_quota_unittest.cc
@@ -11,6 +11,10 @@
 #include "chrome/browser/value_store/testing_value_store.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
+using base::DictionaryValue;
+using base::ListValue;
+using base::Value;
+
 namespace extensions {
 
 // To save typing ValueStore::DEFAULTS/IGNORE_QUOTA everywhere.