Cleanup parts of CPDFSDK_AnnotIterator and CPDFSDK_PageView.

fpdfsdk/include/fsdk_mgr.h

Index: fpdfsdk/include/fsdk_mgr.h
diff --git a/fpdfsdk/include/fsdk_mgr.h b/fpdfsdk/include/fsdk_mgr.h
index 5ddc8e6c57c3268ee8f6e8b852b84669d97c77e3..3d56b19dd5bffab66a85b7197766b28cd7f68846 100644
--- a/fpdfsdk/include/fsdk_mgr.h
+++ b/fpdfsdk/include/fsdk_mgr.h
@@ -12,6 +12,7 @@
 #include "../../core/include/fpdftext/fpdf_text.h"
 #include "../../public/fpdf_formfill.h"
 #include "../../public/fpdf_fwlevent.h"  // cross platform keycode and events define.
+#include "../../third_party/base/nonstd_unique_ptr.h"
 #include "fsdk_common.h"
 #include "fsdk_define.h"
 #include "fx_systemhandler.h"
@@ -300,7 +301,7 @@ class CPDFSDK_PageView final {
   CPDFSDK_Annot* AddAnnot(const FX_CHAR* lpSubType, CPDF_Dictionary* pDict);
   CPDFSDK_Annot* AddAnnot(CPDF_Annot* pPDFAnnot);
   FX_BOOL DeleteAnnot(CPDFSDK_Annot* pAnnot);
-  int CountAnnots();
+  int CountAnnots() const;
   CPDFSDK_Annot* GetAnnot(int nIndex);
   CPDFSDK_Annot* GetAnnotByDict(CPDF_Dictionary* pDict);
   CPDF_Page* GetPDFPage() { return m_page; }
@@ -317,7 +318,7 @@ class CPDFSDK_PageView final {
                        double deltaY,
                        const CPDF_Point& point,
                        int nFlag);
-  FX_BOOL IsValidAnnot(void* p);
+  FX_BOOL IsValidAnnot(void* p) const;
   void GetCurrentMatrix(CPDF_Matrix& matrix) { matrix = m_curMatrix; }
   void UpdateRects(CFX_RectArray& rects);
   void UpdateView(CPDFSDK_Annot* pAnnot);
@@ -334,10 +335,10 @@ class CPDFSDK_PageView final {
  private:
   void PageView_OnHighlightFormFields(CFX_RenderDevice* pDevice,
                                       CPDFSDK_Widget* pWidget);
+
   CPDF_Matrix m_curMatrix;
   CPDF_Page* m_page;
-  CPDF_AnnotList* m_pAnnotList;
-  // CPDFSDK_Annot* m_pFocusAnnot;
+  nonstd::unique_ptr<CPDF_AnnotList> m_pAnnotList;
   CFX_PtrArray m_fxAnnotArray;
   CPDFSDK_Document* m_pSDKDoc;
   CPDFSDK_Widget* m_CaptureWidget;