Disable kDesktopNotificationPosition for ChromeOS

chrome/browser/notifications/notification_prefs_manager.cc

Index: chrome/browser/notifications/notification_prefs_manager.cc
diff --git a/chrome/browser/notifications/notification_prefs_manager.cc b/chrome/browser/notifications/notification_prefs_manager.cc
index 03e118e4f7db6e8fc5ffd4b9d51270b9e73d473a..58c005e083bd86bf41b30095599e845e3956c59a 100644
--- a/chrome/browser/notifications/notification_prefs_manager.cc
+++ b/chrome/browser/notifications/notification_prefs_manager.cc
@@ -11,4 +11,10 @@
 void NotificationPrefsManager::RegisterPrefs(PrefService* prefs) {
   prefs->RegisterIntegerPref(prefs::kDesktopNotificationPosition,
                              BalloonCollection::DEFAULT_POSITION);
+#if defined(OS_CHROMEOS)
+  // Option menu for changing desktop notification position on ChromeOS is
+  // disabled. Force preference to default.
+  prefs->SetInteger(prefs::kDesktopNotificationPosition,
+                    BalloonCollection::DEFAULT_POSITION);
+#endif
 }