add previously focused node to WebClient::focusedNodeChanged

Source/core/page/Chrome.cpp

 /*
  * Copyright (C) 2006, 2007, 2009, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2012, Samsung Electronics. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 96 matching lines @@
 bool Chrome::canTakeFocus(WebFocusType type) const
 {
     return m_client->canTakeFocus(type);
 }
 
 void Chrome::takeFocus(WebFocusType type) const
 {
     m_client->takeFocus(type);
 }
 
-void Chrome::focusedNodeChanged(Node* node) const
+void Chrome::focusedNodeChanged(Node* fromNode, Node* toNode) const
 {
-    m_client->focusedNodeChanged(node);
+    m_client->focusedNodeChanged(fromNode, toNode);
 }
 
 void Chrome::show(NavigationPolicy policy) const
 {
     m_client->show(policy);
 }
 
 bool Chrome::canRunModal() const
 {
     return m_client->canRunModal();
@@ skipping 278 matching lines @@
 {
     m_client->registerViewportLayers();
 }
 
 void Chrome::willBeDestroyed()
 {
     m_client->chromeDestroyed();
 }
 
 } // namespace blink