Move core/fpdfapi/fpdf_font to core/fpdfapi/font

core/fpdfapi/fpdf_font/cpdf_simplefont.h

-// Copyright 2016 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_CPDF_SIMPLEFONT_H_
-#define CORE_FPDFAPI_FPDF_FONT_CPDF_SIMPLEFONT_H_
-
-#include <vector>
-
-#include "core/fpdfapi/fpdf_font/cpdf_font.h"
-#include "core/fpdfapi/fpdf_font/cpdf_fontencoding.h"
-#include "core/fxcrt/fx_string.h"
-#include "core/fxcrt/fx_system.h"
-
-class CPDF_SimpleFont : public CPDF_Font {
- public:
-  CPDF_SimpleFont();
-  ~CPDF_SimpleFont() override;
-
-  // CPDF_Font
-  int GetCharWidthF(uint32_t charcode) override;
-  FX_RECT GetCharBBox(uint32_t charcode) override;
-  int GlyphFromCharCode(uint32_t charcode, bool* pVertGlyph) override;
-  bool IsUnicodeCompatible() const override;
-  CFX_WideString UnicodeFromCharCode(uint32_t charcode) const override;
-  uint32_t CharCodeFromUnicode(FX_WCHAR Unicode) const override;
-
-  CPDF_FontEncoding* GetEncoding() { return &m_Encoding; }
-
- protected:
-  virtual void LoadGlyphMap() = 0;
-
-  bool LoadCommon();
-  void LoadSubstFont();
-  void LoadCharMetrics(int charcode);
-
-  CPDF_FontEncoding m_Encoding;
-  uint16_t m_GlyphIndex[256];
-  uint16_t m_ExtGID[256];
-  std::vector<CFX_ByteString> m_CharNames;
-  int m_BaseEncoding;
-  uint16_t m_CharWidth[256];
-  FX_RECT m_CharBBox[256];
-  bool m_bUseFontWidth;
-};
-
-#endif  // CORE_FPDFAPI_FPDF_FONT_CPDF_SIMPLEFONT_H_