Move core/layout/style to core/style

Source/core/layout/style/StyleWillChangeData.h

-// Copyright 2014 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 StyleWillChangeData_h
-#define StyleWillChangeData_h
-
-#include "core/CSSPropertyNames.h"
-#include "core/CSSValueKeywords.h"
-#include "wtf/PassRefPtr.h"
-#include "wtf/RefCounted.h"
-#include "wtf/Vector.h"
-
-namespace blink {
-
-class StyleWillChangeData : public RefCounted<StyleWillChangeData> {
-public:
-    static PassRefPtr<StyleWillChangeData> create() { return adoptRef(new StyleWillChangeData); }
-    PassRefPtr<StyleWillChangeData> copy() const { return adoptRef(new StyleWillChangeData(*this)); }
-
-    bool operator==(const StyleWillChangeData& o) const
-    {
-        return m_properties == o.m_properties && m_contents == o.m_contents && m_scrollPosition == o.m_scrollPosition;
-    }
-
-    bool operator!=(const StyleWillChangeData& o) const
-    {
-        return !(*this == o);
-    }
-
-    Vector<CSSPropertyID> m_properties;
-    unsigned m_contents : 1;
-    unsigned m_scrollPosition : 1;
-
-private:
-    StyleWillChangeData();
-    StyleWillChangeData(const StyleWillChangeData&);
-};
-
-} // namespace blink
-
-#endif // StyleWillChangeData_h