Makes Ctrl-Shift-L work in AppList

ash/test/test_shell_delegate.h

 // 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.
 
 #ifndef ASH_TEST_TEST_SHELL_DELEGATE_H_
 #define ASH_TEST_TEST_SHELL_DELEGATE_H_
 #pragma once
 
 #include "ash/shell_delegate.h"
 #include "base/compiler_specific.h"
 
 namespace ash {
 namespace test {
 
 class TestShellDelegate : public ShellDelegate {
  public:
   TestShellDelegate();
   virtual ~TestShellDelegate();
 
   // Overridden from ShellDelegate:
   virtual void CreateNewWindow() OVERRIDE;
   virtual views::Widget* CreateStatusArea() OVERRIDE;
+#if defined(OS_CHROMEOS)
+  virtual void LockScreen() OVERRIDE;
+#endif
   virtual void BuildAppListModel(AppListModel* model) OVERRIDE;
   virtual AppListViewDelegate* CreateAppListViewDelegate() OVERRIDE;
   virtual std::vector<aura::Window*> GetCycleWindowList(
       CycleSource source,
       CycleOrder order) const OVERRIDE;
   virtual void LauncherItemClicked(const LauncherItem& item) OVERRIDE;
   virtual bool ConfigureLauncherItem(LauncherItem* item) OVERRIDE;
   virtual int GetBrowserShortcutResourceId() OVERRIDE;
 };
 
 }  // namespace test
 }  // namespace ash
 
 #endif  // ASH_TEST_TEST_SHELL_DELEGATE_H_