Remove attrs sky doesn't support.

sky/engine/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 156 matching lines @@
 
     DocumentMarker* marker = m_innerNonSharedNode->document().markers().markerContainingPoint(m_hitTestLocation.point(), DocumentMarker::Grammar);
     if (!marker)
         return String();
 
     if (RenderObject* renderer = m_innerNonSharedNode->renderer())
         dir = renderer->style()->direction();
     return marker->description();
 }
 
-String HitTestResult::title(TextDirection& dir) const
-{
-    dir = LTR;
-    // Find the title in the nearest enclosing DOM node.
-    // For <area> tags in image maps, walk the tree for the <area>, not the <img> using it.
-    for (Node* titleNode = m_innerNode.get(); titleNode; titleNode = titleNode->parentNode()) {
-        if (titleNode->isElementNode()) {
-            String title = toElement(titleNode)->title();
-            if (!title.isNull()) {
-                if (RenderObject* renderer = titleNode->renderer())
-                    dir = renderer->style()->direction();
-                return title;
-            }
-        }
-    }
-    return String();
-}
-
-const AtomicString& HitTestResult::altDisplayString() const
-{
-    if (!m_innerNonSharedNode)
-        return nullAtom;
-
-    if (isHTMLImageElement(*m_innerNonSharedNode)) {
-        HTMLImageElement& image = toHTMLImageElement(*m_innerNonSharedNode);
-        return image.getAttribute(HTMLNames::altAttr);
-    }
-
-    return nullAtom;
-}
-
 Image* HitTestResult::image() const
 {
     if (!m_innerNonSharedNode)
         return 0;
 
     RenderObject* renderer = m_innerNonSharedNode->renderer();
     if (renderer && renderer->isImage()) {
         RenderImage* image = toRenderImage(renderer);
         if (image->cachedImage() && !image->cachedImage()->errorOccurred())
             return image->cachedImage()->imageForRenderer(image);
@@ skipping 176 matching lines @@
 {
     for (Node* node = m_innerNode.get(); node; node = NodeRenderingTraversal::parent(node)) {
         if (node->isElementNode())
             return toElement(node);
     }
 
     return 0;
 }
 
 } // namespace blink