Add persisted preference for projection touch HUD

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/wm/window_util.h"
 #include "base/command_line.h"
 #include "base/prefs/pref_service.h"
@@ skipping 216 matching lines @@
       ProfileManager::GetDefaultProfileOrOffTheRecord())->
           media_player_event_router()->NotifyTogglePlayState();
 }
 
 void ChromeShellDelegate::HandleMediaPrevTrack() {
   extensions::MediaPlayerAPI::Get(
       ProfileManager::GetDefaultProfileOrOffTheRecord())->
           media_player_event_router()->NotifyPrevTrack();
 }
 
+bool ChromeShellDelegate::IsTouchHudProjectionEnabled() const {
+  if (!ProfileManager::IsGetDefaultProfileAllowed())
+    return false;
+
+  Profile* profile = ProfileManager::GetDefaultProfile();
+  if (!profile)
+    return false;
+
+  PrefService* pref_service = profile->GetPrefs();
+  return pref_service &&
+      pref_service->GetBoolean(prefs::kTouchHudProjectionEnabled);
+}
+
+void ChromeShellDelegate::ToggleTouchHudProjection() {
+  if (!ProfileManager::IsGetDefaultProfileAllowed())
+    return;
+
+  Profile* profile = ProfileManager::GetDefaultProfile();
+  if (!profile)
+    return;
+
+  PrefService* pref_service = profile->GetPrefs();
+  if (!pref_service)
+    return;
+
+  bool enabled = pref_service->GetBoolean(prefs::kTouchHudProjectionEnabled);
+  pref_service->SetBoolean(prefs::kTouchHudProjectionEnabled, !enabled);
+}
+
 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()->CreateLauncher();
       break;
     case chrome::NOTIFICATION_SESSION_STARTED:
       ash::Shell::GetInstance()->ShowLauncher();
       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());
 }