Web Animations CSS: Support animation of {text,box,-webkit-box}-shadow and fix blur clamping

Source/core/animation/AnimatableShadow.h

Index: Source/core/animation/AnimatableShadow.h
diff --git a/Source/core/animation/AnimatableSVGLength.h b/Source/core/animation/AnimatableShadow.h
similarity index 73%
copy from Source/core/animation/AnimatableSVGLength.h
copy to Source/core/animation/AnimatableShadow.h
index 27dba9a48c1a0909de178272d900270e3d107bd8..23fb59b7a08d5f08e7bd555ba8e897080cf78ac9 100644
--- a/Source/core/animation/AnimatableSVGLength.h
+++ b/Source/core/animation/AnimatableShadow.h
@@ -28,46 +28,40 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef AnimatableSVGLength_h
-#define AnimatableSVGLength_h
+#ifndef AnimatableShadow_h
+#define AnimatableShadow_h
 
 #include "core/animation/AnimatableValue.h"
-#include "core/svg/SVGLength.h"
+#include "core/rendering/style/ShadowList.h"
 
 namespace WebCore {
 
-class AnimatableSVGLength: public AnimatableValue {
+class AnimatableShadow : public AnimatableValue {
 public:
-    virtual ~AnimatableSVGLength() { }
-
-    static PassRefPtr<AnimatableSVGLength> create(const SVGLength& length)
+    virtual ~AnimatableShadow() { }
+    static PassRefPtr<AnimatableShadow> create(PassRefPtr<ShadowList> shadowList)
     {
-        return adoptRef(new AnimatableSVGLength(length));
-    }
-
-    const SVGLength& toSVGLength() const
-    {
-        return m_length;
+        return adoptRef(new AnimatableShadow(shadowList));
     }
+    ShadowList* shadowList() const { return m_shadowList.get(); }
 
 protected:
     virtual PassRefPtr<AnimatableValue> interpolateTo(const AnimatableValue*, double fraction) const OVERRIDE;
     virtual PassRefPtr<AnimatableValue> addWith(const AnimatableValue*) const OVERRIDE;
 
 private:
-    AnimatableSVGLength(const SVGLength& length)
-        : m_length(length)
+    explicit AnimatableShadow(PassRefPtr<ShadowList> shadowList)
+        : m_shadowList(shadowList)
     {
     }
-
-    virtual AnimatableType type() const { return TypeSVGLength; }
+    virtual AnimatableType type() const OVERRIDE { return TypeShadow; }
     virtual bool equalTo(const AnimatableValue*) const OVERRIDE;
 
-    SVGLength m_length;
+    const RefPtr<ShadowList> m_shadowList;
 };
 
-DEFINE_ANIMATABLE_VALUE_TYPE_CASTS(AnimatableSVGLength, isSVGLength());
+DEFINE_ANIMATABLE_VALUE_TYPE_CASTS(AnimatableShadow, isShadow());
 
 } // namespace WebCore
 
-#endif // AnimatableSVGLength_h
+#endif // AnimatableShadow_h