Remove attrs sky doesn't support.

sky/engine/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 88 matching lines @@
 void Chrome::show(NavigationPolicy policy) const
 {
     m_client->show(policy);
 }
 
 void Chrome::mouseDidMoveOverElement(const HitTestResult& result, unsigned modifierFlags)
 {
     m_client->mouseDidMoveOverElement(result, modifierFlags);
 }
 
+// TODO(esprehn): Remove this in sky.
 void Chrome::setToolTip(const HitTestResult& result)
 {
     // First priority is a potential toolTip representing a spelling or grammar error
     TextDirection toolTipDirection;
     String toolTip = result.spellingToolTip(toolTipDirection);
 
-    // Next we'll consider a tooltip for element with "title" attribute
-    if (toolTip.isEmpty())
-        toolTip = result.title(toolTipDirection);
-
     m_client->setToolTip(toolTip, toolTipDirection);
 }
 
 void Chrome::setCursor(const Cursor& cursor)
 {
     m_client->setCursor(cursor);
 }
 
 void Chrome::scheduleAnimation()
 {
     WTF_LOG(ScriptedAnimationController, "Chrome::scheduleAnimation");
     m_page->animator().setAnimationFramePending();
     m_client->scheduleAnimation();
 }
 
 void Chrome::willBeDestroyed()
 {
     m_client->chromeDestroyed();
 }
 
 } // namespace blink