Rename xfa_doclayout and xfa_document_layout_imp files.

xfa/fxfa/parser/xfa_document_layout_imp.h

-// Copyright 2014 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_XFA_DOCUMENT_LAYOUT_IMP_H_
-#define XFA_FXFA_PARSER_XFA_DOCUMENT_LAYOUT_IMP_H_
-
-#include "xfa/fxfa/parser/xfa_doclayout.h"
-
-class CXFA_ItemLayoutProcessor;
-class CXFA_LayoutPageMgr;
-class CXFA_ContainerLayoutItem;
-
-class CXFA_LayoutProcessor {
- public:
-  CXFA_LayoutProcessor(CXFA_Document* pDocument);
-  ~CXFA_LayoutProcessor();
-
-  CXFA_Document* GetDocument() const;
-  int32_t StartLayout(FX_BOOL bForceRestart = FALSE);
-  int32_t DoLayout(IFX_Pause* pPause = nullptr);
-  FX_BOOL IncrementLayout();
-  int32_t CountPages() const;
-  CXFA_ContainerLayoutItem* GetPage(int32_t index) const;
-  CXFA_LayoutItem* GetLayoutItem(CXFA_Node* pFormItem);
-
-  void AddChangedContainer(CXFA_Node* pContainer);
-  void SetForceReLayout(FX_BOOL bForceRestart) { m_bNeeLayout = bForceRestart; }
-  CXFA_ContainerLayoutItem* GetRootLayoutItem() const;
-  CXFA_ItemLayoutProcessor* GetRootRootItemLayoutProcessor() {
-    return m_pRootItemLayoutProcessor;
-  }
-  CXFA_LayoutPageMgr* GetLayoutPageMgr() { return m_pLayoutPageMgr; }
-
- protected:
-  void ClearLayoutData();
-
-  FX_BOOL IsNeedLayout();
-
-  CXFA_Document* m_pDocument;
-  CXFA_ItemLayoutProcessor* m_pRootItemLayoutProcessor;
-  CXFA_LayoutPageMgr* m_pLayoutPageMgr;
-  CXFA_NodeArray m_rgChangedContainers;
-  uint32_t m_nProgressCounter;
-  FX_BOOL m_bNeeLayout;
-};
-
-#endif  // XFA_FXFA_PARSER_XFA_DOCUMENT_LAYOUT_IMP_H_