Remove the debugger_ field from Isolate in a PRODUCT build

runtime/lib/developer.cc

 // Copyright (c) 2015, 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/bootstrap_natives.h"
 
 #include "include/dart_api.h"
 
 #include "vm/debugger.h"
 #include "vm/exceptions.h"
 #include "vm/flags.h"
 #include "vm/message.h"
 #include "vm/native_entry.h"
 #include "vm/object.h"
 #include "vm/object_store.h"
 #include "vm/service.h"
 #include "vm/service_isolate.h"
 
 namespace dart {
 
 // Native implementations for the dart:developer library.
 DEFINE_NATIVE_ENTRY(Developer_debugger, 2) {
   GET_NON_NULL_NATIVE_ARGUMENT(Bool, when, arguments->NativeArgAt(0));
+#if !defined(PRODUCT)
   GET_NATIVE_ARGUMENT(String, msg, arguments->NativeArgAt(1));
   Debugger* debugger = isolate->debugger();
-  if (!FLAG_support_debugger || !debugger) {
+  if (!debugger) {
     return when.raw();
   }
   if (when.value()) {
     debugger->PauseDeveloper(msg);
   }
+#endif
   return when.raw();
 }
 
 DEFINE_NATIVE_ENTRY(Developer_inspect, 1) {
   GET_NATIVE_ARGUMENT(Instance, inspectee, arguments->NativeArgAt(0));
 #ifndef PRODUCT
   if (FLAG_support_service) {
     Service::SendInspectEvent(isolate, inspectee);
   }
 #endif  // !PRODUCT
@@ skipping 125 matching lines @@
 #if defined(PRODUCT)
   return Object::null();
 #else
   GET_NON_NULL_NATIVE_ARGUMENT(SendPort, port, arguments->NativeArgAt(0));
   int64_t port_id = port.Id();
   return String::NewFormatted(ISOLATE_SERVICE_ID_FORMAT_STRING, port_id);
 #endif
 }
 
 }  // namespace dart