Replace some calls to Release() with direct delete, part 1.

xfa/fde/fde_render.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_FDE_FDE_RENDER_H_
 #define XFA_FDE_FDE_RENDER_H_
 
+#include <memory>
+
 #include "core/fxcrt/include/fx_coordinates.h"
 #include "xfa/fde/fde_gedevice.h"
 #include "xfa/fde/fde_iterator.h"
 #include "xfa/fde/fde_visualset.h"
 
 class CFDE_RenderDevice;
 
 enum FDE_RENDERSTATUS {
   FDE_RENDERSTATUS_Reset = 0,
   FDE_RENDERSTATUS_Paused,
   FDE_RENDERSTATUS_Done,
   FDE_RENDERSTATUS_Failed,
 };
 
 class CFDE_RenderContext : public CFX_Target {
  public:
   CFDE_RenderContext();
-  ~CFDE_RenderContext();
+  ~CFDE_RenderContext() override;
 
-  void Release() { delete this; }
   FX_BOOL StartRender(CFDE_RenderDevice* pRenderDevice,
                       IFDE_CanvasSet* pCanvasSet,
                       const CFX_Matrix& tmDoc2Device);
   FDE_RENDERSTATUS GetStatus() const { return m_eStatus; }
   FDE_RENDERSTATUS DoRender(IFX_Pause* pPause = nullptr);
   void StopRender();
   void RenderText(IFDE_TextSet* pTextSet, FDE_HVISUALOBJ hText);
   FX_BOOL ApplyClip(IFDE_VisualSet* pVisualSet,
                     FDE_HVISUALOBJ hObj,
                     FDE_HDEVICESTATE& hState);
   void RestoreClip(FDE_HDEVICESTATE hState);
 
  protected:
   FDE_RENDERSTATUS m_eStatus;
   CFDE_RenderDevice* m_pRenderDevice;
-  CFDE_Brush* m_pBrush;
   CFX_Matrix m_Transform;
   FXTEXT_CHARPOS* m_pCharPos;
   int32_t m_iCharPosCount;
-  CFDE_VisualSetIterator* m_pIterator;
+  std::unique_ptr<CFDE_Brush> m_pBrush;
+  std::unique_ptr<CFDE_VisualSetIterator> m_pIterator;
 };
 
 #endif  // XFA_FDE_FDE_RENDER_H_