Support Shift+Search+Arrows to navigate and Control to silence speech everywhere

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 <limits>
 
 #include "ash/caps_lock_delegate_stub.h"
 #include "ash/host/root_window_host_factory.h"
@@ skipping 157 matching lines @@
 }
 
 MagnifierType ShellDelegateImpl::GetMagnifierType() const {
   return screen_magnifier_type_;
 }
 
 bool ShellDelegateImpl::ShouldAlwaysShowAccessibilityMenu() const {
   return false;
 }
 
+void ShellDelegateImpl::SilenceSpokenFeedback() const {
+}
+
 app_list::AppListViewDelegate* ShellDelegateImpl::CreateAppListViewDelegate() {
   return ash::shell::CreateAppListViewDelegate();
 }
 
 ash::LauncherDelegate* ShellDelegateImpl::CreateLauncherDelegate(
     ash::LauncherModel* model) {
   launcher_delegate_ = new LauncherDelegateImpl(watcher_);
   return launcher_delegate_;
 }
 
@@ skipping 56 matching lines @@
 RootWindowHostFactory* ShellDelegateImpl::CreateRootWindowHostFactory() {
   return RootWindowHostFactory::Create();
 }
 
 base::string16 ShellDelegateImpl::GetProductName() const {
   return base::string16();
 }
 
 }  // namespace shell
 }  // namespace ash