Bug 1516702 - Skip building nsDisplaySVGGeometry display items when they have opacity:0. r=jwatt

Differential Revision: https://phabricator.services.mozilla.com/D15891

--HG--
extra : moz-landing-system : lando

layout/svg/SVGGeometryFrame.cpp

@@ -230,7 +230,8 @@ bool SVGGeometryFrame::IsSVGTransformed(
 void SVGGeometryFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
                                         const nsDisplayListSet& aLists) {
   if (!static_cast<const SVGElement*>(GetContent())->HasValidDimensions() ||
-      (!IsVisibleForPainting() && aBuilder->IsForPainting())) {
+      (!IsVisibleForPainting() && aBuilder->IsForPainting()) ||
+      (StyleEffects()->mOpacity == 0.0f)) {
     return;
   }
   DisplayOutline(aBuilder, aLists);