Use stdint.h types throughout PDFium.

core/src/fxcrt/fx_arabic.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_SRC_FXCRT_FX_ARABIC_H_
 #define CORE_SRC_FXCRT_FX_ARABIC_H_
 
 class CFX_BidiChar final : public IFX_BidiChar
 {
 public:
     CFX_BidiChar();
     virtual void                Release() override
     {
         delete this;
     }
     virtual void                SetPolicy(FX_BOOL bSeparateNeutral = TRUE) override
     {
         m_bSeparateNeutral = bSeparateNeutral;
     }
     virtual FX_BOOL             AppendChar(FX_WCHAR wch) override;
     virtual FX_BOOL             EndChar() override;
-    virtual FX_INT32    GetBidiInfo(FX_INT32 &iStart, FX_INT32 &iCount) override;
+    virtual int32_t     GetBidiInfo(int32_t &iStart, int32_t &iCount) override;
     virtual void                Reset() override;
 
 private:
     ~CFX_BidiChar() { }
-    FX_BOOL             m_bSeparateNeutral;
-    FX_INT32    m_iCurStart;
-    FX_INT32    m_iCurCount;
-    FX_INT32    m_iCurBidi;
-    FX_INT32    m_iLastBidi;
-    FX_INT32    m_iLastStart;
-    FX_INT32    m_iLastCount;
+    FX_BOOL     m_bSeparateNeutral;
+    int32_t     m_iCurStart;
+    int32_t     m_iCurCount;
+    int32_t     m_iCurBidi;
+    int32_t     m_iLastBidi;
+    int32_t     m_iLastStart;
+    int32_t     m_iLastCount;
 };
 
 #endif  // CORE_SRC_FXCRT_FX_ARABIC_H_