Return vertical writing mode aware intrinsic information for SVG

Source/core/layout/svg/LayoutSVGRoot.cpp

Index: Source/core/layout/svg/LayoutSVGRoot.cpp
diff --git a/Source/core/layout/svg/LayoutSVGRoot.cpp b/Source/core/layout/svg/LayoutSVGRoot.cpp
index bfb309e05a4eff8d5f0fe2dbe715ff016f5f8745..af3cd61721a2fe3bb6672dbed8ef9dc3b353c79c 100644
--- a/Source/core/layout/svg/LayoutSVGRoot.cpp
+++ b/Source/core/layout/svg/LayoutSVGRoot.cpp
@@ -74,6 +74,9 @@ void LayoutSVGRoot::computeIntrinsicRatioInformation(FloatSize& intrinsicSize, d
     intrinsicSize.setWidth(floatValueForLength(svg->intrinsicWidth(), 0));
     intrinsicSize.setHeight(floatValueForLength(svg->intrinsicHeight(), 0));
 
+    if (!isHorizontalWritingMode())
+        intrinsicSize = intrinsicSize.transposedSize();
+
     if (!intrinsicSize.isEmpty()) {
         intrinsicRatio = intrinsicSize.width() / static_cast<double>(intrinsicSize.height());
     } else {
@@ -85,6 +88,8 @@ void LayoutSVGRoot::computeIntrinsicRatioInformation(FloatSize& intrinsicSize, d
         if (!viewBoxSize.isEmpty()) {
             // The viewBox can only yield an intrinsic ratio, not an intrinsic size.
             intrinsicRatio = viewBoxSize.width() / static_cast<double>(viewBoxSize.height());
+            if (!isHorizontalWritingMode())
+                intrinsicRatio = 1 / intrinsicRatio;
         }
     }
 }