This CL clean up patch in SVGElements.

Source/core/svg/SVGViewSpec.cpp

Index: Source/core/svg/SVGViewSpec.cpp
diff --git a/Source/core/svg/SVGViewSpec.cpp b/Source/core/svg/SVGViewSpec.cpp
index 73e42463ef4a4f177996530a5cebf97668f3af68..fc597cf10cbb309d5de52091b40a2cca082dfe79 100644
--- a/Source/core/svg/SVGViewSpec.cpp
+++ b/Source/core/svg/SVGViewSpec.cpp
@@ -90,10 +90,10 @@ void SVGViewSpec::detachContextElement()
 SVGElement* SVGViewSpec::viewTarget() const
 {
     if (!m_contextElement)
-        return 0;
+        return nullptr;
     Element* element = m_contextElement->treeScope().getElementById(AtomicString(m_viewTargetString));
     if (!element || !element->isSVGElement())
-        return 0;
+        return nullptr;
     return toSVGElement(element);
 }