Fixed two bugs related to OOPIFs

Source/web/ChromeClientImpl.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 176 matching lines @@
     if (!m_webView->client())
         return;
     if (type == WebFocusTypeBackward)
         m_webView->client()->focusPrevious();
     else
         m_webView->client()->focusNext();
 }
 
 void ChromeClientImpl::focusedNodeChanged(Node* fromNode, Node* toNode)
 {
+    if (!m_webView->client())
+        return;
+
     m_webView->client()->focusedNodeChanged(WebNode(fromNode), WebNode(toNode));
 
     WebURL focusURL;
     if (toNode && toNode->isElementNode() && toElement(toNode)->isLiveLink() && toNode->shouldHaveFocusAppearance())
         focusURL = toElement(toNode)->hrefURL();
     m_webView->client()->setKeyboardFocusURL(focusURL);
 }
 
 void ChromeClientImpl::focusedFrameChanged(LocalFrame* frame)
 {
@@ skipping 766 matching lines @@
     for (const auto& observer : observers)
         observer->willOpenPopup();
 }
 
 FloatSize ChromeClientImpl::elasticOverscroll() const
 {
     return m_webView->elasticOverscroll();
 }
 
 } // namespace blink