[Refactor] Moved scrollbar creation and deletion to ScrollbarManager

third_party/WebKit/Source/core/layout/LayoutObject.h

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  *           (C) 2004 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2012 Apple Inc.
  *               All rights reserved.
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 1715 matching lines @@
 
   // When this object is invalidated for paint, this method is called to
   // invalidate any DisplayItemClients owned by this object, including the
   // object itself, LayoutText/LayoutInline line boxes, etc.,
   // not including children which will be invalidated normally during
   // invalidateTreeIfNeeded() and parts which are invalidated separately (e.g.
   // scrollbars). The caller should ensure the painting layer has been
   // setNeedsRepaint before calling this function.
   virtual void InvalidateDisplayItemClients(PaintInvalidationReason) const;
 
+  bool HasCustomScrollbarStyle() const;
+
   virtual bool HasNonCompositedScrollbars() const { return false; }
 
   // Called before anonymousChild.setStyle(). Override to set custom styles for
   // the child.
   virtual void UpdateAnonymousChildStyle(const LayoutObject& anonymous_child,
                                          ComputedStyle& style) const {}
 
   // Returns a rect corresponding to this LayoutObject's bounds for use in
   // debugging output
   virtual LayoutRect DebugRect() const;
@@ skipping 1104 matching lines @@
 CORE_EXPORT void showLineTree(const blink::LayoutObject*);
 CORE_EXPORT void showLayoutTree(const blink::LayoutObject* object1);
 // We don't make object2 an optional parameter so that showLayoutTree
 // can be called from gdb easily.
 CORE_EXPORT void showLayoutTree(const blink::LayoutObject* object1,
                                 const blink::LayoutObject* object2);
 
 #endif
 
 #endif  // LayoutObject_h