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

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

Index: chrome/browser/extensions/api/storage/setting_sync_data.cc
diff --git a/chrome/browser/extensions/api/storage/setting_sync_data.cc b/chrome/browser/extensions/api/storage/setting_sync_data.cc
index cb4fe7921f63a4ee1150c877235aab3c8beaa7ea..42f72f2884389c4b117a73f718b330080c40c7d9 100644
--- a/chrome/browser/extensions/api/storage/setting_sync_data.cc
+++ b/chrome/browser/extensions/api/storage/setting_sync_data.cc
@@ -51,7 +51,7 @@ void SettingSyncData::InitFromExtensionSettingSpecifics(
   if (!value.get()) {
     LOG(WARNING) << "Specifics for " << specifics.extension_id() << "/" <<
         specifics.key() << " had bad JSON for value: " << specifics.value();
-    value.reset(new DictionaryValue());
+    value.reset(new base::DictionaryValue());
   }
   internal_ = new Internal(
       change_type,