Remove more scrolling code from Sky

sky/engine/core/rendering/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 SKY_ENGINE_CORE_RENDERING_STYLE_STYLEWILLCHANGEDATA_H_
 #define SKY_ENGINE_CORE_RENDERING_STYLE_STYLEWILLCHANGEDATA_H_
 
 #include "gen/sky/core/CSSPropertyNames.h"
 #include "gen/sky/core/CSSValueKeywords.h"
 #include "sky/engine/wtf/PassRefPtr.h"
 #include "sky/engine/wtf/RefCounted.h"
 #include "sky/engine/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;
+        return m_properties == o.m_properties && m_contents == o.m_contents;
     }
 
     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  // SKY_ENGINE_CORE_RENDERING_STYLE_STYLEWILLCHANGEDATA_H_