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

tools/web_dev_style/html_checker_test.py

 #!/usr/bin/env python
 # Copyright 2015 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.
 
 import html_checker
 from os import path as os_path
 import re
 from sys import path as sys_path
 import test_util
 import unittest
 
 _HERE = os_path.dirname(os_path.abspath(__file__))
-sys_path.append(os_path.join(_HERE, '..', '..', '..', 'build'))
+sys_path.append(os_path.join(_HERE, '..', '..', 'build'))
 
 import find_depot_tools  # pylint: disable=W0611
 from testing_support.super_mox import SuperMoxTestBase
 
 
 class HtmlCheckerTest(SuperMoxTestBase):
   def setUp(self):
     SuperMoxTestBase.setUp(self)
 
     input_api = self.mox.CreateMockAnything()
@@ skipping 180 matching lines @@
       '<setting-checkbox prefs="{{prefs}}">',
       '<paper-input tab-index="[[tabIndex_]]">',
       '<div style="font: [[getFont_(item)]]">',
     ]
     for line in lines:
       self.ShouldPassCheck(line, self.checker.QuotePolymerBindings)
 
 
 if __name__ == '__main__':
   unittest.main()