VM: Fix product build.

runtime/vm/flags.cc

 // 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.
 
 #include "vm/flags.h"
 
 #include "platform/assert.h"
 #include "vm/json_stream.h"
 #include "vm/os.h"
 
@@ skipping 22 matching lines @@
 #if defined(PRODUCT) && defined(DART_PRECOMPILED_RUNTIME)
 // Nothing to be done for the product flag definitions.
 #define RELEASE_FLAG_MARCO(name, product_value, type, default_value, comment)
 // Nothing to be done for the precompilation flag definitions.
 #define PRECOMPILE_FLAG_MARCO(name, pre_value, product_value, type,            \
                               default_value, comment)
 
 #elif defined(PRODUCT)  // !PRECOMPILED
 // Nothing to be done for the product flag definitions.
 #define RELEASE_FLAG_MARCO(name, product_value, type, default_value, comment)
+// Nothing to be done for the precompilation flag definitions.
+#define PRECOMPILE_FLAG_MARCO(name, pre_value, product_value, type,            \
+                              default_value, comment)
 
 #elif defined(DART_PRECOMPILED_RUNTIME)  // !PRODUCT
 #define RELEASE_FLAG_MARCO(name, product_value, type, default_value, comment)  \
   type FLAG_##name = Flags::Register_##type(&FLAG_##name,                      \
                                             #name,                             \
                                             default_value,                     \
                                             comment);
 // Nothing to be done for the precompilation flag definitions.
 #define PRECOMPILE_FLAG_MARCO(name, pre_value, product_value, type,            \
                               default_value, comment)
@@ skipping 480 matching lines @@
   }
   JSONObject jsobj(js);
   jsobj.AddProperty("type", "FlagList");
   JSONArray jsarr(&jsobj, "flags");
   for (intptr_t i = 0; i < num_flags_; ++i) {
     PrintFlagToJSONArray(&jsarr, flags_[i]);
   }
 }
 
 }  // namespace dart