Make predefined character table slightly smaller.

core/include/fpdfapi/fpdf_resource.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_INCLUDE_FPDFAPI_FPDF_RESOURCE_H_
 #define CORE_INCLUDE_FPDFAPI_FPDF_RESOURCE_H_
 
 #include <map>
@@ skipping 326 matching lines @@
   // CPDF_SimpleFont:
   void LoadGlyphMap() override {}
 
   int m_CharWidthL[256];
   CPDF_Dictionary* m_pCharProcs;
   CPDF_Dictionary* m_pPageResources;
   CPDF_Dictionary* m_pFontResources;
   std::map<FX_DWORD, CPDF_Type3Char*> m_CacheMap;
 };
 
-enum CIDSet {
+enum CIDSet : uint8_t {
   CIDSET_UNKNOWN,
   CIDSET_GB1,
   CIDSET_CNS1,
   CIDSET_JAPAN1,
   CIDSET_KOREA1,
   CIDSET_UNICODE,
   CIDSET_NUM_SETS
 };
 
 class CPDF_CIDFont : public CPDF_Font {
@@ skipping 407 matching lines @@
 
   FX_BOOL m_bInterpolate;
 
   CPDF_Document* m_pDocument;
 
   CPDF_Dictionary* m_pOC;
   CPDF_Dictionary* InitJPEG(uint8_t* pData, FX_DWORD size);
 };
 
 #endif  // CORE_INCLUDE_FPDFAPI_FPDF_RESOURCE_H_