Add foundation for removing AnimatableValues from StyleInterpolation

Source/core/animation/DefaultAnimationType.h

Index: Source/core/animation/DefaultAnimationType.h
diff --git a/Source/core/animation/DefaultAnimationType.h b/Source/core/animation/DefaultAnimationType.h
new file mode 100644
index 0000000000000000000000000000000000000000..732d2cb4d3f9cac4cf501ae7e4e8a1826506600a
--- /dev/null
+++ b/Source/core/animation/DefaultAnimationType.h
@@ -0,0 +1,59 @@
+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef DefaultAnimationType_h
+#define DefaultAnimationType_h
+
+#include "core/animation/AnimationType.h"
+
+namespace blink {
+
+class DefaultAnimationType : public AnimationType {
+public:
+    DefaultAnimationType(CSSPropertyID property)
+        : m_property(property)
+    { }
+
+    virtual CSSPropertyID property() const { return m_property; }
+
+    virtual bool maybeConvertSingle(
+        const CSSPropertySpecificKeyframe&,
+        const StyleResolverState*,
+        RefPtrWillBeRawPtr<InterpolationInvalidators>& resultInvalidators,
+        OwnPtrWillBeRawPtr<InterpolableValue>& resultInterpolableValue,
+        RefPtrWillBeRawPtr<NonInterpolableValue>& resultNonInterpolableValue) const;
+
+    virtual void apply(const InterpolableValue&, const NonInterpolableValue*, StyleResolverState&) const;
+private:
+    const CSSPropertyID m_property;
+};
+
+class DefaultNonInterpolableValue : public NonInterpolableValue {
+public:
+    static PassRefPtrWillBeRawPtr<DefaultNonInterpolableValue> create(PassRefPtrWillBeRawPtr<CSSValue> cssValue)
+    {
+        return adoptRefWillBeNoop(new DefaultNonInterpolableValue(cssValue));
+    }
+
+    CSSValue* cssValue() const { return m_cssValue.get(); }
+
+    DEFINE_INLINE_VIRTUAL_TRACE()
+    {
+        NonInterpolableValue::trace(visitor);
+        visitor->trace(m_cssValue);
+    }
+    DECLARE_NON_INTERPOLABLE_VALUE_TYPE();
+private:
+    DefaultNonInterpolableValue(PassRefPtrWillBeRawPtr<CSSValue> cssValue)
+        : m_cssValue(cssValue)
+    { }
+
+    RefPtrWillBeMember<CSSValue> m_cssValue;
+};
+
+DEFINE_NON_INTERPOLABLE_VALUE_TYPE_CASTS(DefaultNonInterpolableValue);
+
+} // namespace blink
+
+#endif // DefaultAnimationType_h