Remove redundant timeline API

runtime/bin/main.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 <stdlib.h>
 #include <string.h>
 #include <stdio.h>
 
 #include "include/dart_api.h"
 #include "include/dart_tools_api.h"
@@ skipping 822 matching lines @@
 
   if (!run_precompiled_snapshot && !run_full_snapshot) {
     // Load the specified application script into the newly created isolate.
     result = DartUtils::LoadScript(script_uri);
     CHECK_RESULT(result);
 
     // Run event-loop and wait for script loading to complete.
     result = Dart_RunLoop();
     CHECK_RESULT(result);
 
-    if (isolate_data->load_async_id >= 0) {
-      Dart_TimelineAsyncEnd("LoadScript", isolate_data->load_async_id);
-    }
+    Dart_TimelineEvent("LoadScript",
+                       Dart_TimelineGetMicros(),
+                       Dart_GetMainPortId(),
+                       Dart_Timeline_Event_Async_End,
+                       0, NULL, NULL);
 
     result = DartUtils::SetupIOLibrary(script_uri);
     CHECK_RESULT(result);
   } else if (run_full_snapshot) {
     result = DartUtils::SetupIOLibrary(script_uri);
     CHECK_RESULT(result);
   }
 
   // Make the isolate runnable so that it is ready to handle messages.
   Dart_ExitScope();
@@ skipping 846 matching lines @@
   Platform::Exit(Process::GlobalExitCode());
 }
 
 }  // namespace bin
 }  // namespace dart
 
 int main(int argc, char** argv) {
   dart::bin::main(argc, argv);
   UNREACHABLE();
 }