ParameterInitializerRewriter must maintain temporary variable order

src/ast/scopes.cc

Index: src/ast/scopes.cc
diff --git a/src/ast/scopes.cc b/src/ast/scopes.cc
index 0032d4aaba9316fb82f9bc8a7720d4c602e416a7..94b3101906e4c9308d53c520897990eec5822383 100644
--- a/src/ast/scopes.cc
+++ b/src/ast/scopes.cc
@@ -564,17 +564,16 @@ Variable* Scope::NewTemporary(const AstRawString* name) {
   return var;
 }
 
-
-bool Scope::RemoveTemporary(Variable* var) {
+int Scope::RemoveTemporary(Variable* var) {
   // Most likely (always?) any temporary variable we want to remove
   // was just added before, so we search backwards.
   for (int i = temps_.length(); i-- > 0;) {
     if (temps_[i] == var) {
       temps_.Remove(i);
-      return true;
+      return i;
     }
   }
-  return false;
+  return -1;
 }