Add getIsolateID to Service class in dart:developer

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"
@@ skipping 154 matching lines @@
   GET_NON_NULL_NATIVE_ARGUMENT(Bool, enabled, arguments->NativeArgAt(1));
   if (!ServiceIsolate::IsRunning()) {
     SendNull(port);
   } else {
     ServiceIsolate::ControlWebServer(port, enabled.value());
   }
   return Object::null();
 #endif
 }
 
+
+DEFINE_NATIVE_ENTRY(Developer_getIsolateIDFromSendPort, 1) {
+#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