Make --trace-loading great again.

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 899 matching lines @@
   }
   if (isolate_run_app_snapshot) {
     Dart_Handle result = Loader::ReloadNativeExtensions();
     CHECK_RESULT(result);
   }
 
   if (Dart_IsServiceIsolate(isolate)) {
     // If this is the service isolate, load embedder specific bits and return.
     bool skip_library_load = isolate_run_app_snapshot;
     if (!VmService::Setup(vm_service_server_ip, vm_service_server_port,
-                          skip_library_load, vm_service_dev_mode)) {
+                          skip_library_load, vm_service_dev_mode,
+                          trace_loading)) {
       *error = strdup(VmService::GetErrorMessage());
       return NULL;
     }
     if (compile_all) {
       result = Dart_CompileAll();
       CHECK_RESULT(result);
     }
     result = Dart_SetEnvironmentCallback(EnvironmentCallback);
     CHECK_RESULT(result);
     Dart_ExitScope();
@@ skipping 736 matching lines @@
   Platform::Exit(Process::GlobalExitCode());
 }
 
 }  // namespace bin
 }  // namespace dart
 
 int main(int argc, char** argv) {
   dart::bin::main(argc, argv);
   UNREACHABLE();
 }