Update animation when changes in animation keyframes are detected.

Source/core/css/PropertySetCSSStyleDeclaration.h

 /*
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 #ifndef PropertySetCSSStyleDeclaration_h
 #define PropertySetCSSStyleDeclaration_h
 
+#include "core/css/CSSKeyframeRule.h"
 #include "core/css/CSSStyleDeclaration.h"
 #include "wtf/HashMap.h"
 #include "wtf/OwnPtr.h"
 
 namespace blink {
 
 class CSSRule;
 class CSSValue;
 class Element;
 class ExceptionState;
@@ skipping 103 matching lines @@
     virtual void deref() override;
 #endif
     virtual CSSStyleSheet* parentStyleSheet() const override;
     virtual Element* parentElement() const override { return m_parentElement; }
 
     virtual void didMutate(MutationType) override;
 
     RawPtrWillBeMember<Element> m_parentElement;
 };
 
+class KeyframeStyleRuleCSSStyleDeclaration final : public PropertySetCSSStyleDeclaration {

[esprehn, 2015/01/30 02:50:28]

It'd be nice to put this and the impl in new .h and .cpp files. You should just
extend the StyleRuleCSSStyleDeclaration too, you can remove the final. That
saves you from having so much duplicate ref counting and such code.

[shend, 2015/02/01 23:49:14]

Done.

+public:
+    static PassRefPtrWillBeRawPtr<KeyframeStyleRuleCSSStyleDeclaration> create(MutableStylePropertySet& propertySet, CSSKeyframeRule* parentRule)
+    {
+        return adoptRefWillBeNoop(new KeyframeStyleRuleCSSStyleDeclaration(propertySet, parentRule));
+    }
+
+#if !ENABLE(OILPAN)
+    void clearParentRule() { m_parentRule = nullptr; }
+
+    virtual void ref() override;
+    virtual void deref() override;
+#endif
+
+    void reattach(MutableStylePropertySet&);
+
+    virtual void trace(Visitor*) override;
+
+private:
+    KeyframeStyleRuleCSSStyleDeclaration(MutableStylePropertySet&, CSSKeyframeRule*);
+    virtual ~KeyframeStyleRuleCSSStyleDeclaration();
+
+    virtual CSSStyleSheet* parentStyleSheet() const override;
+
+    virtual CSSRule* parentRule() const override { return m_parentRule;  }
+
+    virtual void willMutate() override;
+    virtual void didMutate(MutationType) override;
+
+#if !ENABLE(OILPAN)
+    unsigned m_refCount;
+#endif
+    RawPtrWillBeMember<CSSKeyframeRule> m_parentRule;
+};
+
 } // namespace blink
 
 #endif