Add console errors and usecounter when srcset candidates are dropped

Source/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 291 matching lines @@
 
         if (!source->mediaQueryMatches())
             continue;
 
         String sizes = source->fastGetAttribute(sizesAttr);
         if (!sizes.isNull())
             UseCounter::count(document(), UseCounter::Sizes);
         SizesAttributeParser parser = SizesAttributeParser(MediaValuesDynamic::create(document()), sizes);
         float effectiveSize = parser.length();
         m_effectiveSizeViewportDependant = parser.viewportDependant();
-        ImageCandidate candidate = bestFitSourceForSrcsetAttribute(document().devicePixelRatio(), effectiveSize, source->fastGetAttribute(srcsetAttr));
+        ImageCandidate candidate = bestFitSourceForSrcsetAttribute(document().devicePixelRatio(), effectiveSize, source->fastGetAttribute(srcsetAttr), &document());
         if (candidate.isEmpty())
             continue;
         return candidate;
     }
     return ImageCandidate();
 }
 
 RenderObject* HTMLImageElement::createRenderer(RenderStyle* style)
 {
     if (style->hasContent())
@@ skipping 314 matching lines @@
     if (!foundURL) {
         float effectiveSize = 0;
         if (RuntimeEnabledFeatures::pictureSizesEnabled()) {
             String sizes = fastGetAttribute(sizesAttr);
             if (!sizes.isNull())
                 UseCounter::count(document(), UseCounter::Sizes);
             SizesAttributeParser parser = SizesAttributeParser(MediaValuesDynamic::create(document()), sizes);
             effectiveSize = parser.length();
             m_effectiveSizeViewportDependant = parser.viewportDependant();
         }
-        ImageCandidate candidate = bestFitSourceForImageAttributes(document().devicePixelRatio(), effectiveSize, fastGetAttribute(srcAttr), fastGetAttribute(srcsetAttr));
+        ImageCandidate candidate = bestFitSourceForImageAttributes(document().devicePixelRatio(), effectiveSize, fastGetAttribute(srcAttr), fastGetAttribute(srcsetAttr), &document());
         setBestFitURLAndDPRFromImageCandidate(candidate);
     }
     if (m_intrinsicSizingViewportDependant && m_effectiveSizeViewportDependant && !m_listener) {
         m_listener = ViewportChangeListener::create(this);
         document().mediaQueryMatcher().addViewportListener(m_listener);
     }
     imageLoader().updateFromElement(behavior);
 }
 
 const KURL& HTMLImageElement::sourceURL() const
 {
     return cachedImage()->response().url();
 }
 
 }