Add product mode:

runtime/vm/flag_list.h

Index: runtime/vm/flag_list.h
diff --git a/runtime/vm/flag_list.h b/runtime/vm/flag_list.h
new file mode 100644
index 0000000000000000000000000000000000000000..c25d5c80effab27b0bbcae7f681352f9d122d26f
--- /dev/null
+++ b/runtime/vm/flag_list.h
@@ -0,0 +1,25 @@
+// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+#ifndef VM_FLAG_LIST_H_
+#define VM_FLAG_LIST_H_
+
+// List of all flags in the VM.
+// Flags can be one of three categories:
+// * P roduct flags: Can be set in any of the deployment modes, including in
+//   production.
+// * D ebug flags: Can only be set in debug VMs, which also have assertions
+//   enabled.
+// * R elease flags: Generally available flags except when building product.
+
+#define FLAG_LIST(P, R, D) \
+R(disassemble, false, bool, false, "Disassemble dart code.")                   \
+R(disassemble_optimized, false, bool, false, "Disassemble optimized code.")    \
+R(dump_symbol_stats, false, bool, false, "Dump symbol table statistics")       \
+R(pretenure_all, false, bool, false, "Global pretenuring (for testing).")      \
+D(trace_handles, bool, false, "Traces allocation of handles.")                 \
+D(trace_zones, bool, false, "Traces allocation sizes in the zone.")            \
+P(verbose_gc, bool, false, "Enables verbose GC.")                              \
+
+#endif  // VM_FLAG_LIST_H_