Do not toggle Applist with Search key press when accessibility is enabled.

ash/shell/shell_delegate_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 "ash/shell/shell_delegate_impl.h"
 
 #include "ash/shell/example_factory.h"
 #include "ash/shell/launcher_delegate_impl.h"
 #include "ash/shell/toplevel_window.h"
 #include "ash/shell_window_ids.h"
@@ skipping 31 matching lines @@
 
 void ShellDelegateImpl::UnlockScreen() {
   locked_ = false;
   ash::Shell::GetInstance()->UpdateShelfVisibility();
 }
 
 bool ShellDelegateImpl::IsScreenLocked() const {
   return locked_;
 }
 
+bool ShellDelegateImpl::IsSpokenFeedbackEnabled() const {
+  return false;
+}
+
 void ShellDelegateImpl::Shutdown() {
 }
 
 void ShellDelegateImpl::Exit() {
   MessageLoopForUI::current()->Quit();
 }
 
 void ShellDelegateImpl::NewTab() {
 }
 
@@ skipping 55 matching lines @@
 
 ash::UserWallpaperDelegate* ShellDelegateImpl::CreateUserWallpaperDelegate() {
   return NULL;
 }
 aura::client::UserActionClient* ShellDelegateImpl::CreateUserActionClient() {
   return NULL;
 }
 
 }  // namespace shell
 }  // namespace ash