ParameterInitializerRewriter must maintain temporary variable order

src/ast/scopes.h

Index: src/ast/scopes.h
diff --git a/src/ast/scopes.h b/src/ast/scopes.h
index 3440e0d1b99f87e8f073ac78579d1a75c05c1d84..5c59c1091fa4c42014b9e8dc893c0400dd6f7f40 100644
--- a/src/ast/scopes.h
+++ b/src/ast/scopes.h
@@ -209,7 +209,9 @@ class Scope: public ZoneObject {
 
   // Remove a temporary variable. This is for adjusting the scope of
   // temporaries used when desugaring parameter initializers.
-  bool RemoveTemporary(Variable* var);
+  // Returns the index at which it was found in this scope, or -1 if
+  // it was not found.
+  int RemoveTemporary(Variable* var);
 
   // Adds a temporary variable in this scope's TemporaryScope. This is for
   // adjusting the scope of temporaries used when desugaring parameter