Move Animatable* hierarchy into new folder.

Source/core/animation/AnimatableLengthBox.h

Index: Source/core/animation/AnimatableLengthBox.h
diff --git a/Source/core/animation/AnimatableLengthBox.h b/Source/core/animation/AnimatableLengthBox.h
deleted file mode 100644
index f796e753bc394ab76cf86b502d01e2e27ae47a25..0000000000000000000000000000000000000000
--- a/Source/core/animation/AnimatableLengthBox.h
+++ /dev/null
@@ -1,76 +0,0 @@
-/*
- * 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
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "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 THE COPYRIGHT
- * OWNER 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 AnimatableLengthBox_h
-#define AnimatableLengthBox_h
-
-#include "core/animation/AnimatableValue.h"
-
-namespace WebCore {
-
-class AnimatableLengthBox FINAL : public AnimatableValue {
-public:
-    virtual ~AnimatableLengthBox() { }
-    static PassRefPtrWillBeRawPtr<AnimatableLengthBox> create(PassRefPtrWillBeRawPtr<AnimatableValue> left, PassRefPtrWillBeRawPtr<AnimatableValue> right, PassRefPtrWillBeRawPtr<AnimatableValue> top, PassRefPtrWillBeRawPtr<AnimatableValue> bottom)
-    {
-        return adoptRefWillBeNoop(new AnimatableLengthBox(left, right, top, bottom));
-    }
-    const AnimatableValue* left() const { return m_left.get(); }
-    const AnimatableValue* right() const { return m_right.get(); }
-    const AnimatableValue* top() const { return m_top.get(); }
-    const AnimatableValue* bottom() const { return m_bottom.get(); }
-
-    virtual void trace(Visitor*) OVERRIDE;
-
-protected:
-    virtual PassRefPtrWillBeRawPtr<AnimatableValue> interpolateTo(const AnimatableValue*, double fraction) const OVERRIDE;
-
-private:
-    AnimatableLengthBox(PassRefPtrWillBeRawPtr<AnimatableValue> left, PassRefPtrWillBeRawPtr<AnimatableValue> right, PassRefPtrWillBeRawPtr<AnimatableValue> top, PassRefPtrWillBeRawPtr<AnimatableValue> bottom)
-        : m_left(left)
-        , m_right(right)
-        , m_top(top)
-        , m_bottom(bottom)
-    {
-    }
-    virtual AnimatableType type() const OVERRIDE { return TypeLengthBox; }
-    virtual bool equalTo(const AnimatableValue*) const OVERRIDE;
-
-    RefPtrWillBeMember<AnimatableValue> m_left;
-    RefPtrWillBeMember<AnimatableValue> m_right;
-    RefPtrWillBeMember<AnimatableValue> m_top;
-    RefPtrWillBeMember<AnimatableValue> m_bottom;
-};
-
-DEFINE_ANIMATABLE_VALUE_TYPE_CASTS(AnimatableLengthBox, isLengthBox());
-
-} // namespace WebCore
-
-#endif // AnimatableLengthBox_h