Reverts third_party/protobuf: Update to HEAD (f52e188fe4)

third_party/protobuf/src/google/protobuf/util/internal/json_stream_parser.h

 // Protocol Buffers - Google's data interchange format
 // Copyright 2008 Google Inc.  All rights reserved.
 // https://developers.google.com/protocol-buffers/
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 // notice, this list of conditions and the following disclaimer.
@@ skipping 161 matching lines @@
   // Parses from the ARRAY_VALUE state.
   util::Status ParseArrayValue(TokenType type);
 
   // Parses from the ARRAY_MID state.
   util::Status ParseArrayMid(TokenType type);
 
   // Expects p_ to point to an unquoted literal
   util::Status ParseTrue();
   util::Status ParseFalse();
   util::Status ParseNull();
-  util::Status ParseEmptyNull();
-
-  // Whether an empty-null is allowed in the current state.
-  bool IsEmptyNullAllowed(TokenType type);
 
   // Report a failure as a util::Status.
   util::Status ReportFailure(StringPiece message);
 
   // Report a failure due to an UNKNOWN token type. We check if we hit the
   // end of the stream and if we're finishing or not to detect what type of
   // status to return in this case.
   util::Status ReportUnknown(StringPiece message);
 
   // Advance p_ past all whitespace or until the end of the string.
@@ skipping 48 matching lines @@
   // The character that opened the string, either ' or ".
   // A value of 0 indicates that string parsing is not in process.
   char string_open_;
 
   // Storage for the chunk that are being parsed in ParseChunk().
   string chunk_storage_;
 
   // Whether to allow non UTF-8 encoded input and replace invalid code points.
   bool coerce_to_utf8_;
 
-  // Whether allows empty string represented null array value or object entry
-  // value.
-  bool allow_empty_null_;
-
-  // Whether allows out-of-range floating point numbers or reject them.
-  bool loose_float_number_conversion_;
-
   GOOGLE_DISALLOW_IMPLICIT_CONSTRUCTORS(JsonStreamParser);
 };
 
 }  // namespace converter
 }  // namespace util
 }  // namespace protobuf
 
 }  // namespace google
 #endif  // GOOGLE_PROTOBUF_UTIL_CONVERTER_JSON_STREAM_PARSER_H__