Implement DeferredAnimatableValue

Source/core/animation/AnimatableValue.cpp

 /*
  * Copyright (C) 2013 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 16 matching lines @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
 #include "core/animation/AnimatableValue.h"
 
 #include "core/animation/AnimatableNeutral.h"
 #include "core/animation/AnimatableNumber.h"
 #include "core/animation/AnimatableUnknown.h"
+#include "core/animation/DeferredAnimatableValue.h"
 
 #include <algorithm>
 
 namespace WebCore {
 
 PassRefPtr<AnimatableValue> AnimatableValue::create(CSSValue* value)
 {
     // FIXME: Move this logic to a separate factory class.
     // FIXME: Handle all animatable CSSValue types.
     if (AnimatableNumber::canCreateFrom(value))
         return AnimatableNumber::create(value);
     return AnimatableUnknown::create(value);
 }
 
 const AnimatableValue* AnimatableValue::neutralValue()
 {
     static AnimatableNeutral* neutralSentinelValue = AnimatableNeutral::create().leakRef();
     return neutralSentinelValue;
 }
 
+const AnimatableValue* AnimatableValue::deferredSnapshotValue()

[Steve Block, 2013/08/05 08:14:56]

deferredValue() to match DeferredAnimatableValue?

+{
+    static DeferredAnimatableValue* deferredAnimatableValueSentinel = DeferredAnimatableValue::create().leakRef();
+    return deferredAnimatableValueSentinel;
+}
+
 PassRefPtr<AnimatableValue> AnimatableValue::interpolate(const AnimatableValue* left, const AnimatableValue* right, double fraction)
 {
     ASSERT(left);
     ASSERT(right);
     ASSERT(!left->isNeutral());
     ASSERT(!right->isNeutral());
 
     if (fraction && fraction != 1 && left->isSameType(right))
         return left->interpolateTo(right, fraction);
 
@@ skipping 10 matching lines @@
     if (right->isNeutral())
         return takeConstRef(left);
 
     if (left->isSameType(right))
         return left->addWith(right);
 
     return defaultAddWith(left, right);
 }
 
 } // namespace WebCore