base/json: Get rid of static initializer in JSONReader.

base/json/json_reader.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
 // A JSON parser.  Converts strings of JSON into a Value object (see
 // base/values.h).
 // http://www.ietf.org/rfc/rfc4627.txt?number=4627
 //
 // Known limitations/deviations from the RFC:
 // - Only knows how to parse ints within the range of a signed 32 bit int and
@@ skipping 46 matching lines @@
      STRING,
      NUMBER,
      BOOL_TRUE,              // true
      BOOL_FALSE,             // false
      NULL_TOKEN,             // null
      LIST_SEPARATOR,         // ,
      OBJECT_PAIR_SEPARATOR,  // :
      END_OF_INPUT,
      INVALID_TOKEN,
     };
+
     Token(Type t, const wchar_t* b, int len)
-      : type(t), begin(b), length(len) {}
+        : type(t), begin(b), length(len) {}
 
     // Get the character that's one past the end of this token.
     wchar_t NextChar() {
       return *(begin + length);
     }
 
+    static Token CreateInvalidToken() {
+      return Token(INVALID_TOKEN, 0, 0);
+    }
+
     Type type;
 
     // A pointer into JSONReader::json_pos_ that's the beginning of this token.
     const wchar_t* begin;
 
     // End should be one char past the end of the token.
     int length;
   };
 
   // Error codes during parsing.
@@ skipping 124 matching lines @@
   JsonParseError error_code_;
   int error_line_;
   int error_col_;
 
   DISALLOW_COPY_AND_ASSIGN(JSONReader);
 };
 
 }  // namespace base
 
 #endif  // BASE_JSON_JSON_READER_H_