[SVG2] Elements that don't render shouldn't contribute to ancestor bboxes.

Source/core/rendering/svg/RenderSVGPath.cpp

Index: Source/core/rendering/svg/RenderSVGPath.cpp
diff --git a/Source/core/rendering/svg/RenderSVGPath.cpp b/Source/core/rendering/svg/RenderSVGPath.cpp
index 8f60c8d1cfb0f004d33000c5364795ccf8e9930d..1761443d444cbce8c68b52ccbb9608cabfacbb25 100644
--- a/Source/core/rendering/svg/RenderSVGPath.cpp
+++ b/Source/core/rendering/svg/RenderSVGPath.cpp
@@ -160,4 +160,11 @@ void RenderSVGPath::updateZeroLengthSubpaths()
     subpathData.pathIsDone();
 }
 
+bool RenderSVGPath::isRenderingDisabled() const
+{
+    // For a polygon, polyline and path, rendering is disabled if the d
+    // or points attribute is missing or empty.
+    return path().isEmpty();
+}
+
 }