Add persisted preference for projection touch HUD

chrome/browser/ui/ash/chrome_shell_delegate_chromeos.cc

Index: chrome/browser/ui/ash/chrome_shell_delegate_chromeos.cc
diff --git a/chrome/browser/ui/ash/chrome_shell_delegate_chromeos.cc b/chrome/browser/ui/ash/chrome_shell_delegate_chromeos.cc
index 09becbbe96ac98fbd54706f64fe5ee2d0824b680..7c8209e8c7ed3fab0593a3331829a13a7f70f40a 100644
--- a/chrome/browser/ui/ash/chrome_shell_delegate_chromeos.cc
+++ b/chrome/browser/ui/ash/chrome_shell_delegate_chromeos.cc
@@ -234,6 +234,35 @@ void ChromeShellDelegate::HandleMediaPrevTrack() {
           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) {