Pass implementation object to supplemental classes by reference

Source/core/svg/SVGTests.h

Index: Source/core/svg/SVGTests.h
diff --git a/Source/core/svg/SVGTests.h b/Source/core/svg/SVGTests.h
index 3113f518327548fb965fd406e539a7756a0455c4..7cd5eb3cf8d53ba6ead4b8f2565510eb266c5788 100644
--- a/Source/core/svg/SVGTests.h
+++ b/Source/core/svg/SVGTests.h
@@ -32,11 +32,11 @@ class SVGElement;
 
 class SVGTests {
 public:
-    static SVGStringListTearOff* requiredFeatures(SVGTests* object) { return object->m_requiredFeatures->tearOff(); }
-    static SVGStringListTearOff* requiredExtensions(SVGTests* object) { return object->m_requiredExtensions->tearOff(); }
-    static SVGStringListTearOff* systemLanguage(SVGTests* object) { return object->m_systemLanguage->tearOff(); }
+    static SVGStringListTearOff* requiredFeatures(SVGTests& object) { return object.m_requiredFeatures->tearOff(); }
+    static SVGStringListTearOff* requiredExtensions(SVGTests& object) { return object.m_requiredExtensions->tearOff(); }
+    static SVGStringListTearOff* systemLanguage(SVGTests& object) { return object.m_systemLanguage->tearOff(); }
 
-    static bool hasExtension(SVGTests*, const String&);
+    static bool hasExtension(SVGTests&, const String&);
     bool isValid() const;
 
     bool parseAttribute(const QualifiedName&, const AtomicString&);