Fix value_cleanup to handle cases where arg_expr is a macro.

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

Index: tools/clang/value_cleanup/tests/list-value-append-expected.cc
diff --git a/tools/clang/value_cleanup/tests/list-value-append-expected.cc b/tools/clang/value_cleanup/tests/list-value-append-expected.cc
index 374580724afa8b22675ab1a3a2fe9dfcf93d2e8f..ad89f7c6ae95a0b0a1ba503f81aa2d18cef06b11 100644
--- a/tools/clang/value_cleanup/tests/list-value-append-expected.cc
+++ b/tools/clang/value_cleanup/tests/list-value-append-expected.cc
@@ -4,9 +4,12 @@
 
 #include "base/values.h"
 
+#define true true
+
 void F() {
   base::ListValue list;
   list.AppendBoolean(1 == 0);
+  list.AppendBoolean(true);
   list.AppendInteger(static_cast<unsigned char>(1.0));
   list.AppendDouble(double{3});
   list.AppendString("abc");