Disable tray override feature.

chrome/browser/ui/views/message_center/web_notification_tray.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/views/message_center/web_notification_tray.h"
 
 #include "base/i18n/number_formatting.h"
 #include "base/prefs/pref_service.h"
 #include "base/strings/string16.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 333 matching lines @@
   if (!status_tray)
     return;
 
   status_icon_ = status_tray->CreateStatusIcon(
       StatusTray::NOTIFICATION_TRAY_ICON, image, tool_tip);
   if (!status_icon_)
     return;
 
   status_icon_->AddObserver(this);
   AddQuietModeMenu(status_icon_);
-#if defined(OS_WIN)
-  if (did_force_tray_visible_.get() && !did_force_tray_visible_->GetValue()) {
-    EnforceStatusIconVisible();
-    did_force_tray_visible_->SetValue(true);
-  }
-#endif
 }
 
 void WebNotificationTray::DestroyStatusIcon() {
   if (!status_icon_)
     return;
 
   status_icon_->RemoveObserver(this);
   StatusTray* status_tray = g_browser_process->status_tray();
   if (status_tray)
     status_tray->RemoveStatusIcon(status_icon_);
@@ skipping 16 matching lines @@
   status_icon_menu_ = menu.get();
   status_icon->SetContextMenu(menu.Pass());
 }
 
 MessageCenterWidgetDelegate*
 WebNotificationTray::GetMessageCenterWidgetDelegateForTest() {
   return message_center_delegate_;
 }
 
 }  // namespace message_center