Disable display: contents in SVG.

third_party/WebKit/Source/core/svg/SVGElement.cpp

Index: third_party/WebKit/Source/core/svg/SVGElement.cpp
diff --git a/third_party/WebKit/Source/core/svg/SVGElement.cpp b/third_party/WebKit/Source/core/svg/SVGElement.cpp
index 88b13cabd79b091f5a2cf4d69f8c1e4987973a16..05a1963d10b0d5313846d7f116e3aeadd9791ce9 100644
--- a/third_party/WebKit/Source/core/svg/SVGElement.cpp
+++ b/third_party/WebKit/Source/core/svg/SVGElement.cpp
@@ -1026,6 +1026,14 @@ PassRefPtr<ComputedStyle> SVGElement::customStyleForLayoutObject() {
       correspondingElement(), style, DisallowStyleSharing);
 }
 
+bool SVGElement::layoutObjectIsNeeded(const ComputedStyle& style) {
+  // Display: contents on SVG isn't really specified, see:
+  // https://www.w3.org/TR/SVG/painting.html#DisplayProperty
+  if (style.display() == EDisplay::Contents)
+    return true;
+  return Element::layoutObjectIsNeeded(style);
+}
+
 MutableStylePropertySet* SVGElement::animatedSMILStyleProperties() const {
   if (hasSVGRareData())
     return svgRareData()->animatedSMILStyleProperties();