Rename xfa_doclayout and xfa_document_layout_imp files.

xfa/fxfa/parser/cxfa_layoutprocessor.h

-// Copyright 2014 PDFium Authors. All rights reserved.
+// 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_XFA_DOCUMENT_LAYOUT_IMP_H_
-#define XFA_FXFA_PARSER_XFA_DOCUMENT_LAYOUT_IMP_H_
+#ifndef XFA_FXFA_PARSER_CXFA_LAYOUTPROCESSOR_H_
+#define XFA_FXFA_PARSER_CXFA_LAYOUTPROCESSOR_H_
 
-#include "xfa/fxfa/parser/xfa_doclayout.h"
+#include "core/fxcrt/include/fx_system.h"
+#include "xfa/fxfa/parser/xfa_object.h"
 
+class CXFA_ContainerLayoutItem;
+class CXFA_Document;
 class CXFA_ItemLayoutProcessor;
+class CXFA_LayoutItem;
 class CXFA_LayoutPageMgr;
-class CXFA_ContainerLayoutItem;
+class CXFA_Node;
+class IFX_Pause;
 
 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:
+ private:
   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_
+#endif  // XFA_FXFA_PARSER_CXFA_LAYOUTPROCESSOR_H_