Fix value_cleanup to handle cases where arg_expr is a macro.

tools/clang/value_cleanup/tests/list-value-append-original.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/values.h"
 
+#define true true
+
 void F() {
   base::ListValue list;
   list.Append(new base::FundamentalValue(1 == 0));
+  list.Append(new base::FundamentalValue(true));
   list.Append(new base::FundamentalValue(static_cast<unsigned char>(1.0)));
   list.Append(new base::FundamentalValue(double{3}));
   list.Append(new base::StringValue("abc"));
 }