Code change to avoid signed/unsigned mismatch warnings

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 30 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(int index, CPDF_Font* pFont);
-  CPDF_Font* GetFont(int index) const;
+  void SetFont(uint32_t index, 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, int index);
+  CPDF_Font* Find(CPDF_Document* pDoc, uint32_t index);
 
   // Takes ownership of |pFont|.
-  void Set(CPDF_Document* key, int index, CPDF_Font* pFont);
+  void Set(CPDF_Document* key, uint32_t index, CPDF_Font* pFont);
 
   CPDF_CMapManager m_CMapManager;
   struct {
     const struct FXCMAP_CMap* m_pMapList;
-    int m_Count;
+    uint32_t m_Count;
   } m_EmbeddedCharsets[CIDSET_NUM_SETS];
   struct {
     const uint16_t* m_pMap;
-    int m_Count;
+    uint32_t m_Count;
   } m_EmbeddedToUnicodes[CIDSET_NUM_SETS];
 
  private:
   std::map<CPDF_Document*, std::unique_ptr<CFX_StockFontArray>> m_StockMap;
 };
 
 struct CMap_CodeRange {
   int m_CharSize;
   uint8_t m_Lower[4];
   uint8_t m_Upper[4];
@@ skipping 112 matching lines @@
 
   static uint32_t StringToCode(const CFX_ByteStringC& str);
   static CFX_WideString StringToWideString(const CFX_ByteStringC& str);
 };
 
 void FPDFAPI_LoadCID2UnicodeMap(CIDSet charset,
                                 const uint16_t*& pMap,
                                 uint32_t& count);
 
 #endif  // CORE_FPDFAPI_FPDF_FONT_FONT_INT_H_