Update animation when changes in animation keyframes are detected.

Source/core/css/PropertySetCSSStyleDeclaration.h

 /*
  * Copyright (C) 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
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  * 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 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 43 matching lines @@
 #endif
 
     virtual void trace(Visitor*) override;
 
 protected:
     virtual MutableStylePropertySet& propertySet() const override final { ASSERT(m_propertySet); return *m_propertySet; }
 
     RawPtrWillBeMember<MutableStylePropertySet> m_propertySet; // Cannot be null
 };
 
-class StyleRuleCSSStyleDeclaration final : public PropertySetCSSStyleDeclaration
+class StyleRuleCSSStyleDeclaration : public PropertySetCSSStyleDeclaration
 {
 public:
     static PassRefPtrWillBeRawPtr<StyleRuleCSSStyleDeclaration> create(MutableStylePropertySet& propertySet, CSSRule* parentRule)
     {
         return adoptRefWillBeNoop(new StyleRuleCSSStyleDeclaration(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:
+protected:
     StyleRuleCSSStyleDeclaration(MutableStylePropertySet&, CSSRule*);
     virtual ~StyleRuleCSSStyleDeclaration();
 
     virtual CSSStyleSheet* parentStyleSheet() const override;
 
     virtual CSSRule* parentRule() const override { return m_parentRule;  }
 
     virtual void willMutate() override;
     virtual void didMutate(MutationType) override;
 
@@ skipping 23 matching lines @@
     virtual Element* parentElement() const override { return m_parentElement; }
 
     virtual void didMutate(MutationType) override;
 
     RawPtrWillBeMember<Element> m_parentElement;
 };
 
 } // namespace blink
 
 #endif