Move chrome/browser/web_dev_style/ to tools/ to use from more places

tools/web_dev_style/regex_check.py

 # Copyright 2014 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.
 
 
 def RegexCheck(re, line_number, line, regex, msg):
   """Searches for |regex| in |line| to check for a particular style
      violation, returning a message like the one below if the regex matches.
      The |regex| must have exactly one capturing group so that the relevant
      part of |line| can be highlighted. If more groups are needed, use
      "(?:...)" to make a non-capturing group. Sample message:
 
        line 6: Use var instead of const.
            const foo = bar();
            ^^^^^
   """
 
   def _highlight(match):
     """Takes a start position and a length, and produces a row of '^'s to
        highlight the corresponding part of a string.
     """
     return match.start(1) * ' ' + (match.end(1) - match.start(1)) * '^'
 
   match = re.search(regex, line)
   if match:
     assert len(match.groups()) == 1
     return '  line %d: %s\n%s\n%s' % (line_number, msg, line, _highlight(match))
   return ''