Change 'Parse error' to three more informative messages.

src/messages.js

 // Copyright 2012 the V8 project authors. All rights reserved.
 // 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.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 90 matching lines @@
   proto_poison_pill:             ["Generic use of __proto__ accessor not allowed"],
   // RangeError
   invalid_array_length:          ["Invalid array length"],
   invalid_array_buffer_length:   ["Invalid array buffer length"],
   invalid_typed_array_offset:    ["Start offset is too large"],
   invalid_typed_array_length:    ["Length is too large"],
   invalid_typed_array_alignment: ["%0", "of", "%1", "should be a multiple of", "%3"],
   stack_overflow:                ["Maximum call stack size exceeded"],
   invalid_time_value:            ["Invalid time value"],
   // SyntaxError
-  unable_to_parse:               ["Parse error"],
+  paren_in_arg_string:           ["Function arg string contains parenthesis"],
+  not_isvar:                     ["builtin %IS_VAR: not a variable"],
+  single_function_literal:       ["Single function literal required"],
   invalid_regexp_flags:          ["Invalid flags supplied to RegExp constructor '", "%0", "'"],
   invalid_regexp:                ["Invalid RegExp pattern /", "%0", "/"],
   illegal_break:                 ["Illegal break statement"],
   illegal_continue:              ["Illegal continue statement"],
   illegal_return:                ["Illegal return statement"],
   illegal_let:                   ["Illegal let declaration outside extended mode"],
   error_loading_debugger:        ["Error loading debugger"],
   no_input_to_regexp:            ["No input to ", "%0"],
   invalid_json:                  ["String '", "%0", "' is not valid JSON"],
   circular_structure:            ["Converting circular structure to JSON"],
@@ skipping 1190 matching lines @@
     %SetOverflowedStackTrace(this, void 0);
   }
 
   %DefineOrRedefineAccessorProperty(
       boilerplate, 'stack', getter, setter, DONT_ENUM);
 
   return boilerplate;
 }
 
 var kStackOverflowBoilerplate = SetUpStackOverflowBoilerplate();