Have srcset respond to viewport changes

Source/core/rendering/RenderImage.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2006 Allan Sandfeld Jensen (kde@carewolf.com)
  *           (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2004, 2005, 2006, 2007, 2009, 2010, 2011 Apple 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
@@ skipping 46 matching lines @@
 
     void setIsGeneratedContent(bool generated = true) { m_isGeneratedContent = generated; }
 
     bool isGeneratedContent() const { return m_isGeneratedContent; }
 
     String altText() const { return m_altText; }
 
     inline void setImageDevicePixelRatio(float factor) { m_imageDevicePixelRatio = factor; }
     float imageDevicePixelRatio() const { return m_imageDevicePixelRatio; }
 
+    virtual void intrinsicSizeChanged() OVERRIDE
+    {
+        if (m_imageResource)
+            imageChanged(m_imageResource->imagePtr());
+    }
+
 protected:
     virtual bool needsPreferredWidthsRecalculation() const OVERRIDE FINAL;
     virtual RenderBox* embeddedContentBox() const OVERRIDE FINAL;
     virtual void computeIntrinsicRatioInformation(FloatSize& intrinsicSize, double& intrinsicRatio) const OVERRIDE FINAL;
 
     virtual void imageChanged(WrappedImagePtr, const IntRect* = 0) OVERRIDE;
 
     void paintIntoRect(GraphicsContext*, const LayoutRect&);
     virtual void paint(PaintInfo&, const LayoutPoint&) OVERRIDE FINAL;
     virtual void layout() OVERRIDE;
     virtual bool updateImageLoadingPriorities() OVERRIDE FINAL;
 
-    virtual void intrinsicSizeChanged() OVERRIDE
-    {
-        if (m_imageResource)
-            imageChanged(m_imageResource->imagePtr());
-    }
-
 private:
     virtual const char* renderName() const OVERRIDE { return "RenderImage"; }
 
     virtual bool isImage() const OVERRIDE { return true; }
     virtual bool isRenderImage() const OVERRIDE FINAL { return true; }
 
     virtual void paintReplaced(PaintInfo&, const LayoutPoint&) OVERRIDE;
 
     virtual bool foregroundIsKnownToBeOpaqueInRect(const LayoutRect& localRect, unsigned maxDepthToTest) const OVERRIDE FINAL;
     virtual bool computeBackgroundIsKnownToBeObscured() OVERRIDE FINAL;
@@ skipping 21 matching lines @@
     float m_imageDevicePixelRatio;
 
     friend class RenderImageScaleObserver;
 };
 
 DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderImage, isRenderImage());
 
 } // namespace blink
 
 #endif // RenderImage_h