Move property setting/removing/addParsedProperty/addParsedProperties functions to MutableStylePrope…

Source/core/svg/SVGElementRareData.h

Index: Source/core/svg/SVGElementRareData.h
diff --git a/Source/core/svg/SVGElementRareData.h b/Source/core/svg/SVGElementRareData.h
index 8adec52f64c4ad3aa48c1d2e2d89470543da593f..f86b0ab950448365046598fbbc38ee49710d4401 100644
--- a/Source/core/svg/SVGElementRareData.h
+++ b/Source/core/svg/SVGElementRareData.h
@@ -75,8 +75,8 @@ public:
     CSSCursorImageValue* cursorImageValue() const { return m_cursorImageValue; }
     void setCursorImageValue(CSSCursorImageValue* cursorImageValue) { m_cursorImageValue = cursorImageValue; }
 
-    StylePropertySet* animatedSMILStyleProperties() const { return m_animatedSMILStyleProperties.get(); }
-    StylePropertySet* ensureAnimatedSMILStyleProperties()
+    MutableStylePropertySet* animatedSMILStyleProperties() const { return m_animatedSMILStyleProperties.get(); }
+    MutableStylePropertySet* ensureAnimatedSMILStyleProperties()
     {
         if (!m_animatedSMILStyleProperties)
             m_animatedSMILStyleProperties = MutableStylePropertySet::create(SVGAttributeMode);
@@ -114,7 +114,7 @@ private:
     bool m_instancesUpdatesBlocked : 1;
     bool m_useOverrideComputedStyle : 1;
     bool m_needsOverrideComputedStyleUpdate : 1;
-    RefPtr<StylePropertySet> m_animatedSMILStyleProperties;
+    RefPtr<MutableStylePropertySet> m_animatedSMILStyleProperties;
     RefPtr<RenderStyle> m_overrideComputedStyle;
 };