Add key based scrolling on magnified screen for kiosk mode.

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/magnifier/magnifier_key_scroller.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/app_mode/app_mode_utils.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_configuration_observer.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/profiles/profile_manager.h"
 #include "chrome/browser/speech/tts_controller.h"
@@ skipping 10 matching lines @@
 #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() {
+void InitAfterSessionStart() {
+  // Restor 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.
+  ash::Shell* shell = ash::Shell::GetInstance();
   ash::MruWindowTracker::WindowList mru_list =
-      ash::Shell::GetInstance()->mru_window_tracker()->BuildMruWindowList();
+      shell->mru_window_tracker()->BuildMruWindowList();
   if (!mru_list.empty())
     mru_list.front()->Focus();
+
+  // Enable magnifier accelerators as there may be no mouse cursor in
+  // kiosk mode.
+  ash::MagnifierKeyScroller::SetEnabled(chrome::IsRunningInForcedAppMode());
 }
 
 class AccessibilityDelegateImpl : public ash::AccessibilityDelegate {
  public:
   AccessibilityDelegateImpl() {}
   virtual ~AccessibilityDelegateImpl() {}
 
   virtual void ToggleHighContrast() OVERRIDE {
     DCHECK(chromeos::AccessibilityManager::Get());
     chromeos::AccessibilityManager::Get()->EnableHighContrast(
@@ skipping 199 matching lines @@
 }
 
 void ChromeShellDelegate::Observe(int type,
                                   const content::NotificationSource& source,
                                   const content::NotificationDetails& details) {
   switch (type) {
     case chrome::NOTIFICATION_LOGIN_USER_PROFILE_PREPARED:
       ash::Shell::GetInstance()->OnLoginUserProfilePrepared();
       break;
     case chrome::NOTIFICATION_SESSION_STARTED:
-      RestoreFocus();
+      InitAfterSessionStart();
       ash::Shell::GetInstance()->ShowShelf();
       break;
     case chrome::NOTIFICATION_APP_TERMINATING:
       // Let classes unregister themselves as observers of the
       // ash::Shell singleton before the shell is destroyed.
       display_configuration_observer_.reset();
       break;
     default:
       NOTREACHED() << "Unexpected notification " << type;
   }
 }
 
 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());
   registrar_.Add(this,
                  chrome::NOTIFICATION_APP_TERMINATING,
                  content::NotificationService::AllSources());
 }