Update animation when changes in animation keyframes are detected.

Source/core/css/PropertySetCSSStyleDeclaration.h

Index: Source/core/css/PropertySetCSSStyleDeclaration.h
diff --git a/Source/core/css/PropertySetCSSStyleDeclaration.h b/Source/core/css/PropertySetCSSStyleDeclaration.h
index e29ea1a49651890eca705dd1dc7f22af4190a980..77a81c4597ae1d1c2459428e764a768dffa9a7c1 100644
--- a/Source/core/css/PropertySetCSSStyleDeclaration.h
+++ b/Source/core/css/PropertySetCSSStyleDeclaration.h
@@ -26,6 +26,7 @@
 #ifndef PropertySetCSSStyleDeclaration_h
 #define PropertySetCSSStyleDeclaration_h
 
+#include "core/css/CSSKeyframeRule.h"
 #include "core/css/CSSStyleDeclaration.h"
 #include "wtf/HashMap.h"
 #include "wtf/OwnPtr.h"
@@ -149,6 +150,41 @@ private:
     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