Name the states for fpdf_parser_parser.

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 de32b1fb376d96f681cc71c70e337d77f20e0f46..f57ee5593cc1e95aad0b33b53bd88093b609d3de 100644
--- a/core/include/fpdfapi/fpdf_parser.h
+++ b/core/include/fpdfapi/fpdf_parser.h
@@ -450,6 +450,24 @@ class CPDF_Parser {
   std::set<FX_DWORD> m_ParsingObjNums;
 
   friend class CPDF_DataAvail;
+
+ private:
+  enum class ParserState {
+    kDefault,
+    kComment,
+    kWhitespace,
+    kString,
+    kHexString,
+    kEscapedString,
+    kXref,
+    kObjNum,
+    kPostObjNum,
+    kGenNum,
+    kPostGenNum,
+    kTrailer,
+    kBeginObj,
+    kEndObj
+  };
 };
 
 #define FXCIPHER_NONE 0