Create a separate class to encapsulate ScopeInfo serialization....

src/accessors.cc

Index: src/accessors.cc
===================================================================
--- src/accessors.cc	(revision 5059)
+++ src/accessors.cc	(working copy)
@@ -549,8 +549,8 @@
     if (frame->function() != *function) continue;
 
     // If there is an arguments variable in the stack, we return that.
-    int index = ScopeInfo<>::StackSlotIndex(function->shared()->scope_info(),
-                                            Heap::arguments_symbol());
+    int index = function->shared()->scope_info()->
+        StackSlotIndex(Heap::arguments_symbol());
     if (index >= 0) {
       Handle<Object> arguments = Handle<Object>(frame->GetExpression(index));
       if (!arguments->IsTheHole()) return *arguments;