[bindings] Remove custom setter used in CSSStyleDeclaration

Source/core/css/CSSStyleDeclaration.h

Index: Source/core/css/CSSStyleDeclaration.h
diff --git a/Source/core/css/CSSStyleDeclaration.h b/Source/core/css/CSSStyleDeclaration.h
index c24a6ef54aac8c04889ef59343b51fe5dd2fbdd4..9248ff662d1272e68bec9527821ff63ed5d49b5c 100644
--- a/Source/core/css/CSSStyleDeclaration.h
+++ b/Source/core/css/CSSStyleDeclaration.h
@@ -34,6 +34,7 @@ class CSSStyleSheet;
 class CSSValue;
 class ExceptionState;
 class MutableStylePropertySet;
+class ScriptState;
 
 class CORE_EXPORT CSSStyleDeclaration : public NoBaseWillBeGarbageCollectedFinalized<CSSStyleDeclaration>, public ScriptWrappable {
     DEFINE_WRAPPERTYPEINFO();
@@ -69,6 +70,7 @@ public:
 
     virtual bool cssPropertyMatches(CSSPropertyID, const CSSValue*) const = 0;
     virtual CSSStyleSheet* parentStyleSheet() const { return 0; }
+    virtual bool anonymousNamedSetter(ScriptState*, const String& name, const String& value, ExceptionState&);
 
     DEFINE_INLINE_VIRTUAL_TRACE() { }