WIP (Introduce WTF::NonNullPtr<T>.)

Source/core/svg/animation/SVGSMILElement.cpp

Index: Source/core/svg/animation/SVGSMILElement.cpp
diff --git a/Source/core/svg/animation/SVGSMILElement.cpp b/Source/core/svg/animation/SVGSMILElement.cpp
index 91c3499ae4422730e5d30c2215893bdfdaf5dfb4..b5d9aa5cf2ae38fb37a67062430547c4238a471e 100644
--- a/Source/core/svg/animation/SVGSMILElement.cpp
+++ b/Source/core/svg/animation/SVGSMILElement.cpp
@@ -528,7 +528,7 @@ void SVGSMILElement::svgAttributeChanged(const QualifiedName& attrName)
 
 inline Element* SVGSMILElement::eventBaseFor(const Condition& condition)
 {
-    return condition.m_baseID.isEmpty() ? targetElement() : treeScope().getElementById(condition.m_baseID);
+    return condition.m_baseID.isEmpty() ? targetElement() : treeScope()->getElementById(condition.m_baseID);
 }
 
 void SVGSMILElement::connectConditions()
@@ -548,7 +548,7 @@ void SVGSMILElement::connectConditions()
             eventBase->addEventListener(condition.m_name, condition.m_eventListener, false);
         } else if (condition.m_type == Condition::Syncbase) {
             ASSERT(!condition.m_baseID.isEmpty());
-            condition.m_syncbase = treeScope().getElementById(condition.m_baseID);
+            condition.m_syncbase = treeScope()->getElementById(condition.m_baseID);
             if (!isSMILElement(condition.m_syncbase.get())) {
                 condition.m_syncbase = 0;
                 continue;