Notify LayoutImage that intrinsic dimensions changed when sizes changes

third_party/WebKit/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 209 matching lines @@
         m_form->associate(*this);
     } else {
         m_form = nullptr;
     }
 }
 
 void HTMLImageElement::setBestFitURLAndDPRFromImageCandidate(const ImageCandidate& candidate)
 {
     m_bestFitImageURL = candidate.url();
     float candidateDensity = candidate.density();
+    float oldImageDevicePixelRatio = m_imageDevicePixelRatio;
     if (candidateDensity >= 0)
         m_imageDevicePixelRatio = 1.0 / candidateDensity;
 
     bool intrinsicSizingViewportDependant = false;
     if (candidate.getResourceWidth() > 0) {
         intrinsicSizingViewportDependant = true;
         UseCounter::count(document(), UseCounter::SrcsetWDescriptor);
     } else if (!candidate.srcOrigin()) {
         UseCounter::count(document(), UseCounter::SrcsetXDescriptor);
     }
-    if (layoutObject() && layoutObject()->isImage())
+    if (layoutObject() && layoutObject()->isImage()) {
         LayoutImageItem(toLayoutImage(layoutObject())).setImageDevicePixelRatio(m_imageDevicePixelRatio);
 
+        if (oldImageDevicePixelRatio != m_imageDevicePixelRatio)
+            toLayoutImage(layoutObject())->intrinsicSizeChanged();
+    }
+
     if (intrinsicSizingViewportDependant) {
         if (!m_listener)
             m_listener = ViewportChangeListener::create(this);
 
         document().mediaQueryMatcher().addViewportListener(m_listener);
     } else if (m_listener) {
         document().mediaQueryMatcher().removeViewportListener(m_listener);
     }
 }
 
@@ skipping 574 matching lines @@
 {
     ImageResource* image = cachedImage();
     if (!image)
         return IntSize();
     LayoutSize lSize = image->imageSize(LayoutObject::shouldRespectImageOrientation(layoutObject()), 1.0f);
     DCHECK(lSize.fraction().isZero());
     return IntSize(lSize.width().toInt(), lSize.height().toInt());
 }
 
 } // namespace blink