Remove CSSOM mutability in StyleRule.

sky/engine/core/css/StyleRuleKeyframes.h

 /*
  * Copyright (C) 2007, 2008, 2012 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 10 matching lines @@
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef SKY_ENGINE_CORE_CSS_STYLERULEKEYFRAMES_H_
 #define SKY_ENGINE_CORE_CSS_STYLERULEKEYFRAMES_H_
 
 #include "sky/engine/core/css/StyleRule.h"
 #include "sky/engine/wtf/Forward.h"
+#include "sky/engine/wtf/Noncopyable.h"
 #include "sky/engine/wtf/text/AtomicString.h"
 
 namespace blink {
 
 class StyleKeyframe;
 
 class StyleRuleKeyframes final : public StyleRuleBase {
+    WTF_MAKE_NONCOPYABLE(StyleRuleKeyframes);
 public:
     static PassRefPtr<StyleRuleKeyframes> create() { return adoptRef(new StyleRuleKeyframes()); }
 
     ~StyleRuleKeyframes();
 
     const Vector<RefPtr<StyleKeyframe> >& keyframes() const { return m_keyframes; }
 
     void parserAppendKeyframe(PassRefPtr<StyleKeyframe>);
-    void wrapperAppendKeyframe(PassRefPtr<StyleKeyframe>);
-    void wrapperRemoveKeyframe(unsigned);
 
     String name() const { return m_name; }
     void setName(const String& name) { m_name = AtomicString(name); }
 
     bool isVendorPrefixed() const { return m_isPrefixed; }
     void setVendorPrefixed(bool isPrefixed) { m_isPrefixed = isPrefixed; }
 
-    int findKeyframeIndex(const String& key) const;
-
-    PassRefPtr<StyleRuleKeyframes> copy() const { return adoptRef(new StyleRuleKeyframes(*this)); }
-
 private:
     StyleRuleKeyframes();
-    explicit StyleRuleKeyframes(const StyleRuleKeyframes&);
 
     Vector<RefPtr<StyleKeyframe> > m_keyframes;
     AtomicString m_name;
     bool m_isPrefixed;
 };
 
 DEFINE_STYLE_RULE_TYPE_CASTS(Keyframes);
 
 } // namespace blink
 
 #endif  // SKY_ENGINE_CORE_CSS_STYLERULEKEYFRAMES_H_