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

sync/syncable/entry_kernel.cc

Index: sync/syncable/entry_kernel.cc
diff --git a/sync/syncable/entry_kernel.cc b/sync/syncable/entry_kernel.cc
index b65eaa213df22d15bb8520cebfc464d1bd01cd49..d872695243b054a8332eb370cad74d048f04d2ec 100644
--- a/sync/syncable/entry_kernel.cc
+++ b/sync/syncable/entry_kernel.cc
@@ -125,8 +125,8 @@ base::StringValue* StringToValue(const std::string& str) {
   return new base::StringValue(str);
 }
 
-StringValue* UniquePositionToValue(const UniquePosition& pos) {
-  return Value::CreateStringValue(pos.ToDebugString());
+base::StringValue* UniquePositionToValue(const UniquePosition& pos) {
+  return base::Value::CreateStringValue(pos.ToDebugString());
 }
 
 }  // namespace