Make CPDF_Font::Create() return a std::unique_ptr.

core/fpdfapi/fpdf_font/font_int.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 CORE_FPDFAPI_FPDF_FONT_FONT_INT_H_
 #define CORE_FPDFAPI_FPDF_FONT_FONT_INT_H_
 
 #include <map>
@@ skipping 28 matching lines @@
 
   std::map<CFX_ByteString, CPDF_CMap*> m_CMaps;
   CPDF_CID2UnicodeMap* m_CID2UnicodeMaps[6];
 };
 
 class CFX_StockFontArray {
  public:
   CFX_StockFontArray();
   ~CFX_StockFontArray();
 
-  // Takes ownership of |pFont|.
-  void SetFont(uint32_t index, CPDF_Font* pFont);
+  // Takes ownership of |pFont|, returns unowned pointer to it.
+  CPDF_Font* SetFont(uint32_t index, std::unique_ptr<CPDF_Font> pFont);
   CPDF_Font* GetFont(uint32_t index) const;
 
  private:
   std::unique_ptr<CPDF_Font> m_StockFonts[14];
 };
 
 class CPDF_FontGlobals {
  public:
   CPDF_FontGlobals();
   ~CPDF_FontGlobals();
 
   void Clear(CPDF_Document* pDoc);
   CPDF_Font* Find(CPDF_Document* pDoc, uint32_t index);
 
-  // Takes ownership of |pFont|.
-  void Set(CPDF_Document* key, uint32_t index, CPDF_Font* pFont);
+  // Takes ownership of |pFont|, returns unowned pointer to it.
+  CPDF_Font* Set(CPDF_Document* key,
+                 uint32_t index,
+                 std::unique_ptr<CPDF_Font> pFont);
 
   CPDF_CMapManager m_CMapManager;
   struct {
     const struct FXCMAP_CMap* m_pMapList;
     uint32_t m_Count;
   } m_EmbeddedCharsets[CIDSET_NUM_SETS];
   struct {
     const uint16_t* m_pMap;
     uint32_t m_Count;
   } m_EmbeddedToUnicodes[CIDSET_NUM_SETS];
@@ skipping 118 matching lines @@
 
   static uint32_t StringToCode(const CFX_ByteStringC& str);
   static CFX_WideString StringToWideString(const CFX_ByteStringC& str);
 
   std::map<uint32_t, uint32_t> m_Map;
   CPDF_CID2UnicodeMap* m_pBaseMap;
   CFX_WideTextBuf m_MultiCharBuf;
 };
 
 #endif  // CORE_FPDFAPI_FPDF_FONT_FONT_INT_H_