Cleanup: Start using toFoo methods as part of newly adopted coding guideline.

Source/core/rendering/HitTestResult.cpp

 /*
  * Copyright (C) 2006, 2008, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies)
  *
  * 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.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 243 matching lines @@
     return String();
 }
 
 Image* HitTestResult::image() const
 {
     if (!m_innerNonSharedNode)
         return 0;
 
     RenderObject* renderer = m_innerNonSharedNode->renderer();
     if (renderer && renderer->isImage()) {
-        RenderImage* image = static_cast<WebCore::RenderImage*>(renderer);
+        RenderImage* image = toRenderImage(renderer);
         if (image->cachedImage() && !image->cachedImage()->errorOccurred())
             return image->cachedImage()->imageForRenderer(image);
     }
 
     return 0;
 }
 
 IntRect HitTestResult::imageRect() const
 {
     if (!image())
@@ skipping 211 matching lines @@
 Element* HitTestResult::innerElement() const
 {
     for (Node* node = m_innerNode.get(); node; node = NodeRenderingTraversal::parent(node))
         if (node->isElementNode())
             return toElement(node);
 
     return 0;
 }
 
 } // namespace WebCore