use unique_ptr in cxfa_layoutprocessor.h

xfa/fxfa/parser/cxfa_layoutprocessor.h

Index: xfa/fxfa/parser/cxfa_layoutprocessor.h
diff --git a/xfa/fxfa/parser/cxfa_layoutprocessor.h b/xfa/fxfa/parser/cxfa_layoutprocessor.h
index cf1b1e83b4dc3db2feb20491f4faff4f06da749e..5861bf7048e9e540f2ceff5514d7a3a75acd3d42 100644
--- a/xfa/fxfa/parser/cxfa_layoutprocessor.h
+++ b/xfa/fxfa/parser/cxfa_layoutprocessor.h
@@ -7,6 +7,8 @@
 #ifndef XFA_FXFA_PARSER_CXFA_LAYOUTPROCESSOR_H_
 #define XFA_FXFA_PARSER_CXFA_LAYOUTPROCESSOR_H_
 
+#include <memory>
+
 #include "core/fxcrt/fx_system.h"
 #include "xfa/fxfa/parser/xfa_object.h"
 
@@ -30,23 +32,22 @@ class CXFA_LayoutProcessor {
   int32_t CountPages() const;
   CXFA_ContainerLayoutItem* GetPage(int32_t index) const;
   CXFA_LayoutItem* GetLayoutItem(CXFA_Node* pFormItem);
-
   void AddChangedContainer(CXFA_Node* pContainer);
   void SetForceReLayout(bool bForceRestart) { m_bNeeLayout = bForceRestart; }
   CXFA_ContainerLayoutItem* GetRootLayoutItem() const;
-  CXFA_ItemLayoutProcessor* GetRootRootItemLayoutProcessor() {
-    return m_pRootItemLayoutProcessor;
+  CXFA_ItemLayoutProcessor* GetRootRootItemLayoutProcessor() const {
+    return m_pRootItemLayoutProcessor.get();
+  }
+  CXFA_LayoutPageMgr* GetLayoutPageMgr() const {
+    return m_pLayoutPageMgr.get();
   }
-  CXFA_LayoutPageMgr* GetLayoutPageMgr() { return m_pLayoutPageMgr; }
 
  private:
-  void ClearLayoutData();
-
   bool IsNeedLayout();
 
-  CXFA_Document* m_pDocument;
-  CXFA_ItemLayoutProcessor* m_pRootItemLayoutProcessor;
-  CXFA_LayoutPageMgr* m_pLayoutPageMgr;
+  CXFA_Document* const m_pDocument;
+  std::unique_ptr<CXFA_ItemLayoutProcessor> m_pRootItemLayoutProcessor;
+  std::unique_ptr<CXFA_LayoutPageMgr> m_pLayoutPageMgr;
   CXFA_NodeArray m_rgChangedContainers;
   uint32_t m_nProgressCounter;
   bool m_bNeeLayout;