Update animation when changes in animation keyframes are detected.

Source/core/css/PropertySetCSSStyleDeclaration.cpp

Index: Source/core/css/PropertySetCSSStyleDeclaration.cpp
diff --git a/Source/core/css/PropertySetCSSStyleDeclaration.cpp b/Source/core/css/PropertySetCSSStyleDeclaration.cpp
index bfa8e76d7c3947729cf02ed99567dc937cf006d2..0ceef7c01cfcd0490c96e72210acb5256dd8c73e 100644
--- a/Source/core/css/PropertySetCSSStyleDeclaration.cpp
+++ b/Source/core/css/PropertySetCSSStyleDeclaration.cpp
@@ -24,6 +24,7 @@
 
 #include "bindings/core/v8/ExceptionState.h"
 #include "core/HTMLNames.h"
+#include "core/css/CSSKeyframesRule.h"
 #include "core/css/CSSStyleSheet.h"
 #include "core/css/StylePropertySet.h"
 #include "core/css/parser/CSSParser.h"
@@ -393,4 +394,73 @@ void InlineCSSStyleDeclaration::trace(Visitor* visitor)
     AbstractPropertySetCSSStyleDeclaration::trace(visitor);
 }
 
+KeyframeStyleRuleCSSStyleDeclaration::KeyframeStyleRuleCSSStyleDeclaration(MutableStylePropertySet& propertySetArg, CSSKeyframeRule* parentRule)
+    : PropertySetCSSStyleDeclaration(propertySetArg)
+#if !ENABLE(OILPAN)
+    , m_refCount(1)
+#endif
+    , m_parentRule(parentRule)
+{
+#if !ENABLE(OILPAN)
+    m_propertySet->ref();
+#endif
+}
+
+KeyframeStyleRuleCSSStyleDeclaration::~KeyframeStyleRuleCSSStyleDeclaration()
+{
+#if !ENABLE(OILPAN)
+    m_propertySet->deref();
+#endif
+}
+
+#if !ENABLE(OILPAN)
+void KeyframeStyleRuleCSSStyleDeclaration::ref()
+{
+    ++m_refCount;
+}
+
+void KeyframeStyleRuleCSSStyleDeclaration::deref()
+{
+    ASSERT(m_refCount);
+    if (!--m_refCount)
+        delete this;
+}
+#endif
+
+void KeyframeStyleRuleCSSStyleDeclaration::willMutate()
+{
+    if (m_parentRule && m_parentRule->parentStyleSheet())
+        m_parentRule->parentStyleSheet()->willMutateRules();
+}
+
+void KeyframeStyleRuleCSSStyleDeclaration::didMutate(MutationType type)
+{
+    // Style sheet mutation needs to be signaled even if the change failed. willMutateRules/didMutateRules must pair.
+    if (m_parentRule && m_parentRule->parentStyleSheet())
+        m_parentRule->parentStyleSheet()->didMutateRules();
+    toCSSKeyframesRule(m_parentRule->parentRule())->styleChanged();
+}
+
+CSSStyleSheet* KeyframeStyleRuleCSSStyleDeclaration::parentStyleSheet() const
+{
+    return m_parentRule ? m_parentRule->parentStyleSheet() : 0;
+}
+
+void KeyframeStyleRuleCSSStyleDeclaration::reattach(MutableStylePropertySet& propertySet)
+{
+#if !ENABLE(OILPAN)
+    m_propertySet->deref();
+#endif
+    m_propertySet = &propertySet;
+#if !ENABLE(OILPAN)
+    m_propertySet->ref();
+#endif
+}
+
+void KeyframeStyleRuleCSSStyleDeclaration::trace(Visitor* visitor)
+{
+    visitor->trace(m_parentRule);
+    PropertySetCSSStyleDeclaration::trace(visitor);
+}
+
 } // namespace blink