Remove attrs sky doesn't support.

sky/engine/core/html/HTMLImageElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Google Inc. 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 119 matching lines @@
         UseCounter::count(document(), UseCounter::SrcsetWDescriptor);
     } else if (!candidate.srcOrigin()) {
         UseCounter::count(document(), UseCounter::SrcsetXDescriptor);
     }
     if (renderer() && renderer()->isImage())
         toRenderImage(renderer())->setImageDevicePixelRatio(m_imageDevicePixelRatio);
 }
 
 void HTMLImageElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
 {
-    if (name == HTMLNames::srcAttr || name == HTMLNames::srcsetAttr || name == HTMLNames::sizesAttr) {
+    if (name == HTMLNames::srcAttr) {
         selectSourceURL(ImageLoader::UpdateIgnorePreviousError);
     } else {
         HTMLElement::parseAttribute(name, value);
     }
 }
 
 RenderObject* HTMLImageElement::createRenderer(RenderStyle* style)
 {
     RenderImage* image = new RenderImage(this);
     image->setImageResource(RenderImageResource::create());
@@ skipping 203 matching lines @@
     if (renderer() && renderer()->isRenderImage() && image->image() && !image->image()->hasRelativeWidth())
         size.scale(toRenderImage(renderer())->imageDevicePixelRatio());
     return size;
 }
 
 void HTMLImageElement::selectSourceURL(ImageLoader::UpdateFromElementBehavior behavior)
 {
     unsigned effectiveSize = 0;
     ImageCandidate candidate = bestFitSourceForImageAttributes(
         document().devicePixelRatio(), effectiveSize,
-        getAttribute(HTMLNames::srcAttr), getAttribute(HTMLNames::srcsetAttr));
+        getAttribute(HTMLNames::srcAttr), AtomicString());
     setBestFitURLAndDPRFromImageCandidate(candidate);
     if (m_intrinsicSizingViewportDependant && m_effectiveSizeViewportDependant && !m_listener.get()) {
         m_listener = ViewportChangeListener::create(this);
         document().mediaQueryMatcher().addViewportListener(m_listener.get());
     }
     imageLoader().updateFromElement(behavior);
 }
 
 const KURL& HTMLImageElement::sourceURL() const
 {
     return cachedImage()->response().url();
 }
 
 }