Have Document::accessSVGExtensions() return a reference

Source/core/dom/Element.cpp

Index: Source/core/dom/Element.cpp
diff --git a/Source/core/dom/Element.cpp b/Source/core/dom/Element.cpp
index d4b04d89625d2395483c934aa7fddb92f94c807d..f43979d071bf0555cdea59a580c8b51c5fa5c288 100644
--- a/Source/core/dom/Element.cpp
+++ b/Source/core/dom/Element.cpp
@@ -210,7 +210,7 @@ Element::~Element()
         detachAllAttrNodesFromElement();
 
     if (hasPendingResources()) {
-        document().accessSVGExtensions()->removeElementFromPendingResources(this);
+        document().accessSVGExtensions().removeElementFromPendingResources(this);
         ASSERT(!hasPendingResources());
     }
 }
@@ -1373,7 +1373,7 @@ void Element::removedFrom(ContainerNode* insertionPoint)
     ContainerNode::removedFrom(insertionPoint);
     if (wasInDocument) {
         if (hasPendingResources())
-            document().accessSVGExtensions()->removeElementFromPendingResources(this);
+            document().accessSVGExtensions().removeElementFromPendingResources(this);
 
         if (isUpgradedCustomElement())
             CustomElement::didLeaveDocument(this, insertionPoint->document());