[debugger] allow debug-evaluate to change stack and context values.

src/debug/debug-scopes.h

Index: src/debug/debug-scopes.h
diff --git a/src/debug/debug-scopes.h b/src/debug/debug-scopes.h
index 80e19810e742f897731e9f80394304e6afba0207..e317082cb808dc0c5a3585aa00ee2749b7245887 100644
--- a/src/debug/debug-scopes.h
+++ b/src/debug/debug-scopes.h
@@ -75,8 +75,8 @@ class ScopeIterator {
   // be an actual context.
   Handle<Context> CurrentContext();
 
-  // Populate the list with collected non-local variable names.
-  void GetNonLocals(List<Handle<String> >* list_out);
+  // Populate the dictionary with collected non-local variable names.
+  Handle<NameDictionary> GetNonLocals();
 
   bool ThisIsNonLocal();