cros: Fix demo app could bring up CCD.

chrome/browser/chromeos/login/user_manager_impl.cc

 // Copyright (c) 2013 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/chromeos/login/user_manager_impl.h"
 
 #include <cstddef>
 #include <set>
 
 #include "ash/multi_profile_uma.h"
@@ skipping 1499 matching lines @@
   command_line->AppendSwitch(
       wm::switches::kWindowAnimationsDisabled);
 }
 
 void UserManagerImpl::DemoAccountLoggedIn() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   active_user_ = User::CreateKioskAppUser(DemoAppLauncher::kDemoUserName);
   active_user_->SetStubImage(User::kInvalidImageIndex, false);
   WallpaperManager::Get()->SetUserWallpaperNow(DemoAppLauncher::kDemoUserName);
 
+  CommandLine* command_line = CommandLine::ForCurrentProcess();
+  command_line->AppendSwitch(::switches::kForceAppMode);
+  command_line->AppendSwitchASCII(::switches::kAppId,
+                                  DemoAppLauncher::kDemoAppId);
+
   // Disable window animation since the demo app runs in a single full screen
   // window and window animation causes start-up janks.
   CommandLine::ForCurrentProcess()->AppendSwitch(
       wm::switches::kWindowAnimationsDisabled);
 }
 
 void UserManagerImpl::RetailModeUserLoggedIn() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   is_current_user_new_ = true;
   active_user_ = User::CreateRetailModeUser();
@@ skipping 550 matching lines @@
 }
 
 void UserManagerImpl::DeleteUser(User* user) {
   const bool is_active_user = (user == active_user_);
   delete user;
   if (is_active_user)
     active_user_ = NULL;
 }
 
 }  // namespace chromeos