Use srcset's resource pixel density to determine intrinsic size

Source/core/rendering/RenderImageResource.cpp

Index: Source/core/rendering/RenderImageResource.cpp
diff --git a/Source/core/rendering/RenderImageResource.cpp b/Source/core/rendering/RenderImageResource.cpp
index 61301870230f8eafc483f877c34cafa9eec661b2..23cd2806069d808e9e3f1a283538db515753b4cf 100644
--- a/Source/core/rendering/RenderImageResource.cpp
+++ b/Source/core/rendering/RenderImageResource.cpp
@@ -103,4 +103,12 @@ 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