Move InvalidationGuard/InstanceUpdateBlocker out of SVGElementInstance

Source/core/svg/SVGElementInstance.h

Index: Source/core/svg/SVGElementInstance.h
diff --git a/Source/core/svg/SVGElementInstance.h b/Source/core/svg/SVGElementInstance.h
index 660b60ced786b9e50e03a4d764b703abd7cc2f10..b15d37273711dbb089c771c4c4883ba9f8739679 100644
--- a/Source/core/svg/SVGElementInstance.h
+++ b/Source/core/svg/SVGElementInstance.h
@@ -73,27 +73,6 @@ public:
 
     inline Document* ownerDocument() const;
 
-    class InvalidationGuard {
-        WTF_MAKE_NONCOPYABLE(InvalidationGuard);
-    public:
-        InvalidationGuard(SVGElement* element) : m_element(element) { }
-        ~InvalidationGuard() { SVGElementInstance::invalidateAllInstancesOfElement(m_element); }
-    private:
-        SVGElement* m_element;
-    };
-
-    class InstanceUpdateBlocker {
-        WTF_MAKE_NONCOPYABLE(InstanceUpdateBlocker);
-    public:
-        InstanceUpdateBlocker(SVGElement* targetElement);
-        ~InstanceUpdateBlocker();
-
-    private:
-        SVGElement* m_targetElement;
-    };
-
-    static void invalidateAllInstancesOfElement(SVGElement*);
-
     virtual void trace(Visitor*) { }
 
     // EventTarget API