Rename xfa_doclayout and xfa_document_layout_imp files.

xfa/fxfa/parser/cxfa_contentlayoutitem.h

+// Copyright 2016 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+
+#ifndef XFA_FXFA_PARSER_CXFA_CONTENTLAYOUTITEM_H_
+#define XFA_FXFA_PARSER_CXFA_CONTENTLAYOUTITEM_H_
+
+#include "xfa/fxfa/parser/cxfa_layoutitem.h"
+
+class CXFA_ContentLayoutItem : public CXFA_LayoutItem {
+ public:
+  CXFA_ContentLayoutItem(CXFA_Node* pNode);
+  ~CXFA_ContentLayoutItem() override;
+
+  CXFA_ContentLayoutItem* m_pPrev;
+  CXFA_ContentLayoutItem* m_pNext;
+  CFX_PointF m_sPos;
+  CFX_SizeF m_sSize;
+  uint32_t m_dwStatus;
+};
+
+inline CXFA_ContentLayoutItem* ToContentLayoutItem(CXFA_LayoutItem* pItem) {
+  return pItem ? pItem->AsContentLayoutItem() : nullptr;
+}
+
+#endif  // XFA_FXFA_PARSER_CXFA_CONTENTLAYOUTITEM_H_