Remove many features when building product mode

runtime/vm/message.cc

 // Copyright (c) 2011, 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/message.h"
 
 #include "vm/dart_entry.h"
 #include "vm/json_stream.h"
 #include "vm/object.h"
 #include "vm/port.h"
@@ skipping 163 matching lines @@
      ASSERT(current != NULL);
     if (current->Id() == id) {
       return current;
     }
   }
   return NULL;
 }
 
 
 void MessageQueue::PrintJSON(JSONStream* stream) {
+  if (!FLAG_support_service) {
+    return;
+  }
   JSONArray messages(stream);
 
   Object& msg_handler = Object::Handle();
 
   MessageQueue::Iterator it(this);
   intptr_t depth = 0;
   while (it.HasNext()) {
     Message* current = it.Next();
     JSONObject message(&messages);
     message.AddProperty("type", "Message");
@@ skipping 20 matching lines @@
       const Script& script = Script::Handle(function.script());
       if (!script.IsNull()) {
         message.AddLocation(script, function.token_pos(),
                             function.end_token_pos());
       }
     }
   }
 }
 
 }  // namespace dart