Change CPDF_SyntaxParser::GetNextWord() to not pass by non-const ref.

core/include/fpdfapi/fpdf_parser.h

Index: core/include/fpdfapi/fpdf_parser.h
diff --git a/core/include/fpdfapi/fpdf_parser.h b/core/include/fpdfapi/fpdf_parser.h
index 1b1b022fc61db05e8bfc0767765f4aabe4c765d5..756850932e5573fcb1f43704fe4cc3364a365db9 100644
--- a/core/include/fpdfapi/fpdf_parser.h
+++ b/core/include/fpdfapi/fpdf_parser.h
@@ -288,7 +288,7 @@ class CPDF_SyntaxParser {
 
   FX_BOOL ReadBlock(uint8_t* pBuf, FX_DWORD size);
 
-  CFX_ByteString GetNextWord(FX_BOOL& bIsNumber);
+  CFX_ByteString GetNextWord(bool* bIsNumber);
 
  protected:
   friend class CPDF_Parser;
@@ -302,7 +302,7 @@ class CPDF_SyntaxParser {
 
   FX_BOOL GetCharAtBackward(FX_FILESIZE pos, uint8_t& ch);
 
-  void GetNextWord();
+  void GetNextWordInternal(bool* bIsNumber);
 
   bool IsWholeWord(FX_FILESIZE startpos,
                    FX_FILESIZE limit,
@@ -344,8 +344,6 @@ class CPDF_SyntaxParser {
 
   FX_DWORD m_WordSize;
 
-  FX_BOOL m_bIsNumber;
-
   FX_FILESIZE m_dwWordPos;
 };