Change API name and return type of findFocusableNode

Source/core/input/EventHandler.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2012 Digia Plc. 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
@@ skipping 2083 matching lines @@
     if (element.shadowRoot() && element.shadowRoot()->delegatesFocus()) {
         Document* doc = m_frame->document();
         if (element.containsIncludingShadowDOM(doc->focusedElement())) {
             // If the inner element is already focused, do nothing.
             return true;
         }
 
         // If the host has a focusable inner element, focus it. Otherwise, the host takes focus.
         Page* page = m_frame->page();
         ASSERT(page);
-        Node* next = page->focusController().findFocusableNode(WebFocusTypeForward, *element.shadowRoot());
-        if (next && next->isElementNode() && element.containsIncludingShadowDOM(next)) {
+        Element* next = page->focusController().findFocusableElement(WebFocusTypeForward, *element.shadowRoot());
+        if (next && element.containsIncludingShadowDOM(next)) {
             // Use WebFocusTypeForward instead of WebFocusTypeMouse here to mean the focus has slided.
-            toElement(next)->focus(false, WebFocusTypeForward);
+            next->focus(false, WebFocusTypeForward);
             return true;
         }
     }
     return false;
 }
 
 bool EventHandler::handleWheelEvent(const PlatformWheelEvent& event)
 {
 #define RETURN_WHEEL_EVENT_HANDLED() \
     { \
@@ skipping 2086 matching lines @@
 unsigned EventHandler::accessKeyModifiers()
 {
 #if OS(MACOSX)
     return PlatformEvent::CtrlKey | PlatformEvent::AltKey;
 #else
     return PlatformEvent::AltKey;
 #endif
 }
 
 } // namespace blink