[CSS Regions] Elements in a region should be assignable to a named flow

Source/core/svg/SVGElement.h

Index: Source/core/svg/SVGElement.h
diff --git a/Source/core/svg/SVGElement.h b/Source/core/svg/SVGElement.h
index 42209e4061cde393ad7ce002c2daffc64e1977a7..eb7139fc7b4e550f9c7ddd6342317cebfec302ae 100644
--- a/Source/core/svg/SVGElement.h
+++ b/Source/core/svg/SVGElement.h
@@ -120,6 +120,8 @@ public:
     virtual bool addEventListener(const AtomicString& eventType, PassRefPtr<EventListener>, bool useCapture) OVERRIDE;
     virtual bool removeEventListener(const AtomicString& eventType, EventListener*, bool useCapture) OVERRIDE;
 
+    virtual bool moveToFlowThreadIsNeeded(RefPtr<RenderStyle>& cachedStyle) OVERRIDE;
+
 protected:
     SVGElement(const QualifiedName&, Document*, ConstructionType = CreateSVGElement);