A11y: Introduce High Contrast Mode and Screen Magnifier to ubar tray.

ash/system/tray/test_system_tray_delegate.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 "ash/system/tray/test_system_tray_delegate.h"
 
 #include "ash/shell.h"
 #include "ash/shell_delegate.h"
 #include "ash/volume_control_delegate.h"
 #include "base/utf_string_conversions.h"
@@ skipping 113 matching lines @@
 
 void TestSystemTrayDelegate::ShowDriveSettings() {
 }
 
 void TestSystemTrayDelegate::ShowIMESettings() {
 }
 
 void TestSystemTrayDelegate::ShowHelp() {
 }
 
+void TestSystemTrayDelegate::ShowAccessibilityHelp() {
+}
+
 void TestSystemTrayDelegate::ShutDown() {
   MessageLoop::current()->Quit();
 }
 
 void TestSystemTrayDelegate::SignOut() {
   MessageLoop::current()->Quit();
 }
 
 void TestSystemTrayDelegate::RequestLockScreen() {
 }
@@ skipping 142 matching lines @@
   return volume_control_delegate_.get();
 }
 
 void TestSystemTrayDelegate::SetVolumeControlDelegate(
     scoped_ptr<VolumeControlDelegate> delegate) {
   volume_control_delegate_ = delegate.Pass();
 }
 
 }  // namespace test
 }  // namespace ash