Move Frame to the Oilpan heap.

Source/modules/credentialmanager/NavigatorCredentials.cpp

 // Copyright 2014 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 "config.h"
 #include "modules/credentialmanager/NavigatorCredentials.h"
 
 #include "core/dom/Document.h"
 #include "core/frame/LocalDOMWindow.h"
 #include "core/frame/LocalFrame.h"
@@ skipping 35 matching lines @@
 {
     if (!m_credentialsContainer && frame())
         m_credentialsContainer = CredentialsContainer::create();
     return m_credentialsContainer.get();
 }
 
 void NavigatorCredentials::trace(Visitor* visitor)
 {
     visitor->trace(m_credentialsContainer);
     WillBeHeapSupplement<Navigator>::trace(visitor);
+    DOMWindowProperty::trace(visitor);
 }
 
 } // namespace blink