Add getIsolateID to Service class in dart:developer

runtime/lib/developer.cc

Index: runtime/lib/developer.cc
diff --git a/runtime/lib/developer.cc b/runtime/lib/developer.cc
index 5d6027b8f9f68820cffad471c48f188930de232a..e2f5a1ba12ea578e0d136631387bb4cd5a78b445 100644
--- a/runtime/lib/developer.cc
+++ b/runtime/lib/developer.cc
@@ -172,4 +172,16 @@ DEFINE_NATIVE_ENTRY(Developer_webServerControl, 2) {
 #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