Remove more scrolling code from Sky

sky/engine/core/rendering/style/StyleWillChangeData.cpp

 // 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.
 
 #include "sky/engine/config.h"
 #include "sky/engine/core/rendering/style/StyleWillChangeData.h"
 
 namespace blink {
 
 StyleWillChangeData::StyleWillChangeData()
     : m_contents(false)
-    , m_scrollPosition(false)
 {
 }
 
 StyleWillChangeData::StyleWillChangeData(const StyleWillChangeData& o)
     : RefCounted<StyleWillChangeData>()
     , m_properties(o.m_properties)
     , m_contents(o.m_contents)
-    , m_scrollPosition(o.m_scrollPosition)
 {
 }
 
 } // namespace blink