Add an accessibility alert for incorrect use of some accelerators.

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/accessibility_delegate.h"
 #include "ash/media_delegate.h"
 #include "ash/wm/mru_window_tracker.h"
 #include "ash/wm/window_util.h"
 #include "base/command_line.h"
 #include "base/prefs/pref_service.h"
+#include "chrome/browser/accessibility/accessibility_events.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/chromeos/accessibility/accessibility_manager.h"
 #include "chrome/browser/chromeos/accessibility/magnification_manager.h"
 #include "chrome/browser/chromeos/background/ash_user_wallpaper_delegate.h"
 #include "chrome/browser/chromeos/display/display_preferences.h"
 #include "chrome/browser/chromeos/extensions/media_player_api.h"
 #include "chrome/browser/chromeos/extensions/media_player_event_router.h"
 #include "chrome/browser/chromeos/system/ash_system_tray_delegate.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/chrome_new_window_delegate_chromeos.h"
 #include "chrome/browser/ui/ash/session_state_delegate_chromeos.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_finder.h"
 #include "chrome/browser/ui/browser_window.h"
 #include "chrome/common/pref_names.h"
 #include "chromeos/chromeos_switches.h"
 #include "chromeos/dbus/dbus_thread_manager.h"
 #include "chromeos/dbus/power_manager_client.h"
 #include "chromeos/ime/input_method_manager.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/user_metrics.h"
+#include "grit/generated_resources.h"
 #include "ui/aura/window.h"
+#include "ui/base/l10n/l10n_util.h"
 
 namespace {
 
 // This function is used for restoring focus after the user session is started.
 // It's needed because some windows can be opened in background while login UI
 // is still active because we currently restore browser windows before login UI
 // is deleted.
 void RestoreFocus() {
   ash::MruWindowTracker::WindowList mru_list =
       ash::Shell::GetInstance()->mru_window_tracker()->BuildMruWindowList();
@@ skipping 88 matching lines @@
   }
 
   virtual double GetSavedScreenMagnifierScale() OVERRIDE {
     if (chromeos::MagnificationManager::Get()) {
       return chromeos::MagnificationManager::Get()->
           GetSavedScreenMagnifierScale();
     }
     return std::numeric_limits<double>::min();
   }
 
+  virtual void TriggerAccessibilityAlert(
+      ash::AccessibilityAlert alert) OVERRIDE {
+    Profile* profile = ProfileManager::GetDefaultProfile();
+    if (profile) {
+      switch (alert) {
+        case ash::A11Y_ALERT_WINDOW_NEEDED: {
+          AccessibilityAlertInfo event(
+              profile, l10n_util::GetStringUTF8(IDS_A11Y_ALERT_WINDOW_NEEDED));
+          SendControlAccessibilityNotification(
+              ui::AccessibilityTypes::EVENT_ALERT, &event);
+          break;
+        }
+        case ash::A11Y_ALERT_NONE:
+          break;
+      }
+    }
+  }
+
+  virtual ash::AccessibilityAlert GetLastAccessibilityAlert() OVERRIDE {
+    return ash::A11Y_ALERT_NONE;
+  }
+
  private:
   DISALLOW_COPY_AND_ASSIGN(AccessibilityDelegateImpl);
 };
 
 class MediaDelegateImpl : public ash::MediaDelegate {
  public:
   MediaDelegateImpl() {}
   virtual ~MediaDelegateImpl() {}
 
   virtual void HandleMediaNextTrack() OVERRIDE {
@@ skipping 82 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());
 }