Revert 157959 "Introduce a new reference graph to SVG*TearOffs."

Source/core/svg/properties/SVGAnimatedListPropertyTearOff.h

Index: Source/core/svg/properties/SVGAnimatedListPropertyTearOff.h
diff --git a/Source/core/svg/properties/SVGAnimatedListPropertyTearOff.h b/Source/core/svg/properties/SVGAnimatedListPropertyTearOff.h
index f63a625aafe6cf7baf32910b95fef8fd6cf48398..fdbd217ffd5e0b909a73fadadfdb78977806f2d8 100644
--- a/Source/core/svg/properties/SVGAnimatedListPropertyTearOff.h
+++ b/Source/core/svg/properties/SVGAnimatedListPropertyTearOff.h
@@ -109,18 +109,16 @@ public:
     {
         ASSERT(m_isAnimating);
         ASSERT(m_animVal);
-        ASSERT(contextElement());
+        ASSERT(m_values.size() == m_wrappers.size());
 
         ListProperty* animVal = static_cast<ListProperty*>(m_animVal.get());
-        if (animVal->wrappers().size()) {
-            ASSERT(m_values.size() == m_wrappers.size());
-            ASSERT(animVal->values().size() == animVal->wrappers().size());
-            ASSERT(animVal->wrappers().size() == m_animatedWrappers.size());
-
-            animVal->setValuesAndWrappers(&m_values, &m_wrappers, false);
-            ASSERT(animVal->values().size() == animVal->wrappers().size());
-            ASSERT(animVal->wrappers().size() == m_wrappers.size());
-        }
+        ASSERT(animVal->values().size() == animVal->wrappers().size());
+        ASSERT(animVal->wrappers().size() == m_animatedWrappers.size());
+
+        animVal->setValuesAndWrappers(&m_values, &m_wrappers, false);
+        ASSERT(animVal->values().size() == animVal->wrappers().size());
+        ASSERT(animVal->wrappers().size() == m_wrappers.size());
+
         m_animatedWrappers.clear();
         m_isAnimating = false;
     }
@@ -155,14 +153,6 @@ public:
         synchronizeWrappersIfNeeded();
     }
 
-    virtual void detachWrappers() OVERRIDE
-    {
-        if (m_animVal) {
-            ListProperty* animVal = static_cast<ListProperty*>(m_animVal.get());
-            animVal->detachListWrappers(0);
-        }
-    }
-
     static PassRefPtr<SVGAnimatedListPropertyTearOff<PropertyType> > create(SVGElement* contextElement, const QualifiedName& attributeName, AnimatedPropertyType animatedPropertyType, PropertyType& values)
     {
         ASSERT(contextElement);
@@ -178,14 +168,6 @@ protected:
             m_wrappers.fill(0, values.size());
     }
 
-    ~SVGAnimatedListPropertyTearOff()
-    {
-        if (m_baseVal)
-            static_cast<ListPropertyTearOff*>(m_baseVal.get())->clearAnimatedProperty();
-        if (m_animVal)
-            static_cast<ListPropertyTearOff*>(m_animVal.get())->clearAnimatedProperty();
-    }
-
     PropertyType& m_values;
 
     ListWrapperCache m_wrappers;