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

chrome/browser/ui/ash/chrome_shell_delegate_chromeos.cc

 // Copyright 2013 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 "chrome/browser/ui/ash/chrome_shell_delegate.h"
 
 #include "ash/keyboard_overlay/keyboard_overlay_view.h"
 #include "ash/system/chromeos/network/network_observer.h"
 #include "ash/system/tray/system_tray_notifier.h"
 #include "ash/wm/window_util.h"
 #include "base/command_line.h"
 #include "base/prefs/pref_service.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/chromeos/accessibility/accessibility_util.h"
 #include "chrome/browser/chromeos/accessibility/magnification_manager.h"
 #include "chrome/browser/chromeos/background/ash_user_wallpaper_delegate.h"
 #include "chrome/browser/chromeos/cros/cros_library.h"
 #include "chrome/browser/chromeos/cros/network_library.h"
 #include "chrome/browser/chromeos/display/display_preferences.h"
 #include "chrome/browser/chromeos/extensions/file_manager/file_manager_util.h"
 #include "chrome/browser/chromeos/extensions/media_player_api.h"
 #include "chrome/browser/chromeos/extensions/media_player_event_router.h"
 #include "chrome/browser/chromeos/input_method/input_method_configuration.h"
 #include "chrome/browser/chromeos/login/login_display_host_impl.h"
 #include "chrome/browser/chromeos/login/screen_locker.h"
 #include "chrome/browser/chromeos/system/ash_system_tray_delegate.h"
 #include "chrome/browser/extensions/api/terminal/terminal_extension_helper.h"
 #include "chrome/browser/profiles/profile_manager.h"
+#include "chrome/browser/speech/tts_controller.h"
 #include "chrome/browser/ui/ash/caps_lock_delegate_chromeos.h"
 #include "chrome/browser/ui/ash/window_positioner.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_finder.h"
 #include "chrome/browser/ui/browser_window.h"
 #include "chrome/browser/ui/webui/chrome_web_contents_handler.h"
 #include "chrome/browser/ui/webui/chromeos/login/oobe_ui.h"
 #include "chrome/browser/ui/webui/chromeos/mobile_setup_dialog.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/pref_names.h"
@@ skipping 165 matching lines @@
 bool ChromeShellDelegate::ShouldAlwaysShowAccessibilityMenu() const {
   Profile* profile = ProfileManager::GetDefaultProfile();
   if (!profile)
     return false;
 
   PrefService* user_pref_service = profile->GetPrefs();
   return user_pref_service &&
       user_pref_service->GetBoolean(prefs::kShouldAlwaysShowAccessibilityMenu);
 }
 
+void ChromeShellDelegate::SilenceSpokenFeedback() const {
+  TtsController::GetInstance()->Stop();
+}
+
 ash::SystemTrayDelegate* ChromeShellDelegate::CreateSystemTrayDelegate() {
   return chromeos::CreateSystemTrayDelegate();
 }
 
 ash::UserWallpaperDelegate* ChromeShellDelegate::CreateUserWallpaperDelegate() {
   return chromeos::CreateUserWallpaperDelegate();
 }
 
 void ChromeShellDelegate::HandleMediaNextTrack() {
   extensions::MediaPlayerAPI::Get(
@@ skipping 29 matching lines @@
 }
 
 void ChromeShellDelegate::PlatformInit() {
   registrar_.Add(this,
                  chrome::NOTIFICATION_LOGIN_USER_PROFILE_PREPARED,
                  content::NotificationService::AllSources());
   registrar_.Add(this,
                  chrome::NOTIFICATION_SESSION_STARTED,
                  content::NotificationService::AllSources());
 }