suppress default chorme window on first login

chrome/browser/ui/startup/startup_browser_creator.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/startup/startup_browser_creator.h"
 
 #include <algorithm>   // For max().
 #include <set>
 
 #include "base/bind.h"
@@ skipping 234 matching lines @@
   return in_synchronous_profile_launch_;
 }
 
 bool StartupBrowserCreator::LaunchBrowser(
     const CommandLine& command_line,
     Profile* profile,
     const base::FilePath& cur_dir,
     chrome::startup::IsProcessStartup process_startup,
     chrome::startup::IsFirstRun is_first_run,
     int* return_code) {
+
+  if (command_line.HasSwitch(switches::kSilentLaunch)) {
+    //return true;
+  }
+
   in_synchronous_profile_launch_ =
       process_startup == chrome::startup::IS_PROCESS_STARTUP;
   DCHECK(profile);
 
   // Continue with the incognito profile from here on if Incognito mode
   // is forced.
   if (IncognitoModePrefs::ShouldLaunchIncognito(command_line,
                                                 profile->GetPrefs())) {
     profile = profile->GetOffTheRecordProfile();
   } else if (command_line.HasSwitch(switches::kIncognito)) {
@@ skipping 456 matching lines @@
 
 // static
 bool StartupBrowserCreator::ActivatedProfile() {
   return profile_launch_observer.Get().activated_profile();
 }
 
 bool HasPendingUncleanExit(Profile* profile) {
   return profile->GetLastSessionExitType() == Profile::EXIT_CRASHED &&
       !profile_launch_observer.Get().HasBeenLaunched(profile);
 }