add previously focused node to WebClient::focusedNodeChanged

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 179 matching lines @@
 void ChromeClientImpl::takeFocus(FocusType type)
 {
     if (!m_webView->client())
         return;
     if (type == FocusTypeBackward)
         m_webView->client()->focusPrevious();
     else
         m_webView->client()->focusNext();
 }
 
-void ChromeClientImpl::focusedNodeChanged(Node* node)
+void ChromeClientImpl::focusedNodeChanged(Node* previouslyFocusedNode, Node* focusedNode)
 {
-    m_webView->client()->focusedNodeChanged(WebNode(node));
+    // TODO(estade): remove.

[Mike West, 2015/01/19 08:52:16]

Totally tiny nit: We use FIXME in Blink.

[Evan Stade, 2015/01/20 22:23:54]

Done.

+    m_webView->client()->focusedNodeChanged(WebNode(focusedNode));
+    m_webView->client()->focusedNodeChanged(WebNode(previouslyFocusedNode), WebNode(focusedNode));
 
     WebURL focusURL;
-    if (node && node->isElementNode() && toElement(node)->isLiveLink())
-        focusURL = toElement(node)->hrefURL();
+    if (focusedNode && focusedNode->isElementNode() && toElement(focusedNode)->isLiveLink())
+        focusURL = toElement(focusedNode)->hrefURL();
     m_webView->client()->setKeyboardFocusURL(focusURL);
 }
 
 void ChromeClientImpl::focusedFrameChanged(LocalFrame* frame)
 {
     WebLocalFrameImpl* webframe = WebLocalFrameImpl::fromFrame(frame);
     if (webframe && webframe->client())
         webframe->client()->frameFocused();
 }
 
@@ skipping 664 matching lines @@
         webframe->autofillClient()->dataListOptionsChanged(WebInputElement(&input));
 }
 
 void ChromeClientImpl::registerViewportLayers() const
 {
     if (m_webView->rootGraphicsLayer() && m_webView->layerTreeView() && m_webView->pinchVirtualViewportEnabled())
         m_webView->page()->frameHost().pinchViewport().registerLayersWithTreeView(m_webView->layerTreeView());
 }
 
 } // namespace blink