A11y: Add the option to always show the a11y tray menu regardless of the state of a11y features

ash/shell/shell_delegate_impl.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_SHELL_SHELL_DELEGATE_IMPL_H_
 #define ASH_SHELL_SHELL_DELEGATE_IMPL_H_
 
 #include "ash/shell_delegate.h"
 #include "base/compiler_specific.h"
 
 namespace ash {
 namespace shell {
 
 class LauncherDelegateImpl;
 class WindowWatcher;
 
 class ShellDelegateImpl : public ash::ShellDelegate {
  public:
   ShellDelegateImpl();
   virtual ~ShellDelegateImpl();
 
   void SetWatcher(WindowWatcher* watcher);
 
-  virtual bool IsUserLoggedIn() OVERRIDE;
-  virtual bool IsSessionStarted() OVERRIDE;
-  virtual bool IsFirstRunAfterBoot() OVERRIDE;
-  virtual bool CanLockScreen() OVERRIDE;
+  virtual bool IsUserLoggedIn() const OVERRIDE;
+  virtual bool IsSessionStarted() const OVERRIDE;
+  virtual bool IsFirstRunAfterBoot() const OVERRIDE;
+  virtual bool CanLockScreen() const OVERRIDE;
   virtual void LockScreen() OVERRIDE;
   virtual void UnlockScreen() OVERRIDE;
   virtual bool IsScreenLocked() const OVERRIDE;
   virtual void Shutdown() OVERRIDE;
   virtual void Exit() OVERRIDE;
   virtual void NewTab() OVERRIDE;
   virtual void NewWindow(bool incognito) OVERRIDE;
   virtual void ToggleMaximized() OVERRIDE;
   virtual void OpenFileManager(bool as_dialog) OVERRIDE;
   virtual void OpenCrosh() OVERRIDE;
@@ skipping 42 matching lines @@
   bool high_contrast_enabled_;
   MagnifierType screen_magnifier_type_;
 
   DISALLOW_COPY_AND_ASSIGN(ShellDelegateImpl);
 };
 
 }  // namespace shell
 }  // namespace ash
 
 #endif  // ASH_SHELL_SHELL_DELEGATE_IMPL_H_