Pass Manifest JSON paser error line and column number to console.

base/json/json_parser.h

 // Copyright (c) 2012 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.
 
 #ifndef BASE_JSON_JSON_PARSER_H_
 #define BASE_JSON_JSON_PARSER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 40 matching lines @@
   // Parses the input string according to the set options and returns the
   // result as a Value owned by the caller.
   Value* Parse(const StringPiece& input);
 
   // Returns the error code.
   JSONReader::JsonParseError error_code() const;
 
   // Returns the human-friendly error message.
   std::string GetErrorMessage() const;
 
+  // Returns the error line number if parse error happened. Otherwise always
+  // returns 0.
+  int error_line() const;
+
+  // Returns the error column number if parse error happened. Otherwise always
+  // returns 0.
+  int error_column() const;
+
  private:
   enum Token {
     T_OBJECT_BEGIN,           // {
     T_OBJECT_END,             // }
     T_ARRAY_BEGIN,            // [
     T_ARRAY_END,              // ]
     T_STRING,
     T_NUMBER,
     T_BOOL_TRUE,              // true
     T_BOOL_FALSE,             // false
@@ skipping 177 matching lines @@
   FRIEND_TEST_ALL_PREFIXES(JSONParserTest, ConsumeNumbers);
   FRIEND_TEST_ALL_PREFIXES(JSONParserTest, ErrorMessages);
 
   DISALLOW_COPY_AND_ASSIGN(JSONParser);
 };
 
 }  // namespace internal
 }  // namespace base
 
 #endif  // BASE_JSON_JSON_PARSER_H_