Remove --no-startup-window flag when restarting chrome.

chrome/common/switch_utils.cc

 // Copyright (c) 2011 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/common/switch_utils.h"
 
 #include "base/basictypes.h"
 #include "chrome/common/chrome_switches.h"
 
 namespace switches {
 
 // Switches enumerated here will be removed when a background instance of
 // Chrome restarts itself. If your key is designed to only be used once,
 // or if it does not make sense when restarting a background instance to
 // pick up an automatic update, be sure to add it to this list.
 const char* const kSwitchesToRemoveOnAutorestart[] = {
   switches::kApp,
   switches::kAppId,
   switches::kFirstRun,
   switches::kImport,
   switches::kImportFromFile,
-  switches::kMakeDefaultBrowser
+  switches::kMakeDefaultBrowser,
+  switches::kNoStartupWindow,
+  switches::kRestoreLastSession
 };
 
 void RemoveSwitchesForAutostart(
     std::map<std::string, CommandLine::StringType>* switch_list) {
   for (size_t i = 0; i < arraysize(kSwitchesToRemoveOnAutorestart); ++i)
     switch_list->erase(kSwitchesToRemoveOnAutorestart[i]);
 }
 
 }  // namespace switches