Add a flag to control whether there is a shortcut for the app list / launcher in the Windows taskba…

chrome/browser/ui/startup/startup_browser_creator_impl.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_impl.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 344 matching lines @@
       g_browser_process->CreateDevToolsHttpProtocolHandler(
           profile,
           "127.0.0.1",
           static_cast<int>(port),
           frontend_str);
     } else {
       DLOG(WARNING) << "Invalid http debugger port number " << port;
     }
   }
 
+  app_list_controller::CheckAppListTaskbarShortcut();
   if (command_line_.HasSwitch(switches::kShowAppList)) {
     app_list_controller::ShowAppList();
     return true;
   }
 
   // Open the required browser windows and tabs. First, see if
   // we're being run as an application window. If so, the user
   // opened an app shortcut.  Don't restore tabs or open initial
   // URLs in that case. The user should see the window as an app,
   // not as chrome.
@@ skipping 666 matching lines @@
 
 #if !defined(OS_WIN) || defined(USE_AURA)
 // static
 bool StartupBrowserCreatorImpl::OpenStartupURLsInExistingBrowser(
     Profile* profile,
     const std::vector<GURL>& startup_urls) {
   return false;
 }
 #endif