Use viewBox for SVG image as intrinsic size when all else fails

Source/core/layout/LayoutReplaced.cpp

Index: Source/core/layout/LayoutReplaced.cpp
diff --git a/Source/core/layout/LayoutReplaced.cpp b/Source/core/layout/LayoutReplaced.cpp
index cadc5b1efdfca7550721f9fc995e1c951ff800b8..22f0af4f7fc2f8a29b85f3924d8c2174bfaabc7a 100644
--- a/Source/core/layout/LayoutReplaced.cpp
+++ b/Source/core/layout/LayoutReplaced.cpp
@@ -226,6 +226,10 @@ LayoutRect LayoutReplaced::replacedContentRect(const LayoutSize* overriddenIntri
         return contentRect;
     }
 
+    // TODO(davve): intrinsicSize doubles as both intrinsic size and intrinsic ratio. In the case of
+    // SVG images this isn't correct since they can have intrinsic ratio but no intrinsic size. In
+    // order to maintain aspect ratio, the intrinsic size for SVG might be faked from the aspect
+    // ratio, see SVGImage::containerSize().
     LayoutSize intrinsicSize = overriddenIntrinsicSize ? *overriddenIntrinsicSize : this->intrinsicSize();
     if (!intrinsicSize.width() || !intrinsicSize.height())
         return contentRect;