Use srcset's resource pixel density to determine intrinsic size

Source/core/rendering/RenderImageResource.cpp

 /*
  * Copyright (C) 1999 Lars Knoll <knoll@kde.org>
  * Copyright (C) 1999 Antti Koivisto <koivisto@kde.org>
  * Copyright (C) 2000 Dirk Mueller <mueller@kde.org>
  * Copyright (C) 2006 Allan Sandfeld Jensen <kde@carewolf.com>
  * Copyright (C) 2006 Samuel Weinig <sam.weinig@gmail.com>
  * Copyright (C) 2003, 2004, 2005, 2006, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Google Inc. All rights reserved.
  * Copyright (C) 2010 Patrick Gansterer <paroga@paroga.com>
  *
@@ skipping 85 matching lines @@
     ASSERT(m_renderer);
     if (m_cachedImage)
         m_cachedImage->setContainerSizeForRenderer(m_renderer, imageContainerSize, m_renderer->style()->effectiveZoom());
 }
 
 Image* RenderImageResource::nullImage()
 {
     return Image::nullImage();
 }
 
+LayoutSize RenderImageResource::getImageSize(float multiplier, ImageResource::SizeType type) const
+{
+    LayoutSize size = m_cachedImage ? m_cachedImage->imageSizeForRenderer(m_renderer, multiplier, type) : LayoutSize();

[pdr., 2013/10/11 05:17:33]

May want to slightly refactor this to not scale size if there's no
m_cachedImage.

For example:
if (!m_cachedImage)
  return LayoutSize();

LayoutSize size = m_cachedImage->imageSizeForRenderer(...);
if (m_renderer ... etc

[Yoav Weiss, 2013/10/11 07:22:32]

OK

+    if (m_renderer)
+        size.scale(m_renderer->intrinsicSizeFactor());
+    return size;
+}
+
 } // namespace WebCore