Mojo: Mojom: Add basic lexer tests, and remove hex float constants.

mojo/public/bindings/pylib/parse/mojo_parser.py

 #!/usr/bin/env python
 # Copyright 2013 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.
 
 """Generates a syntax tree from a Mojo IDL file."""
 
 
 import sys
 import os.path
@@ skipping 301 matching lines @@
   def p_identifier(self, p):
     """identifier : NAME
                   | NAME DOT identifier"""
     p[0] = ''.join(p[1:])
 
   def p_constant(self, p):
     """constant : INT_CONST_DEC
                 | INT_CONST_OCT
                 | INT_CONST_HEX
                 | FLOAT_CONST
-                | HEX_FLOAT_CONST
                 | CHAR_CONST
                 | STRING_LITERAL"""
     p[0] = _ListFromConcat(*p[1:])
 
   def p_error(self, e):
     if e is None:
       # Unexpected EOF.
       # TODO(vtl): Can we figure out what's missing?
       raise ParseError(self.filename, eof=True)
 
@@ skipping 26 matching lines @@
         print Parse(f.read(), filename)
       except ParseError, e:
         print e
         return 1
 
   return 0
 
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv))