Refactor decorators into thier own python class

tools/chrome_proxy/webdriver/data_use.py

 # Copyright 2016 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 os
 
 import common
 from common import TestDriver
 from common import IntegrationTest
-from common import NotAndroid
+from decorators import NotAndroid
 
 
 class DataUseAscription(IntegrationTest):
 
   # This test uses a desktop extension and cannot be run on Android.
   @NotAndroid
   def testDataUseAscription(self):
     ext_path = os.path.join(os.path.dirname(__file__), os.pardir, os.pardir,
                             os.pardir, 'chrome', 'test', 'data',
                             'chromeproxy', 'extension')
@@ skipping 14 matching lines @@
                'contains(text(),\'check.googlezip.net\')]')
       js_xpath_query = ("document.evaluate(\"%s\", document, null, "
                         "XPathResult.ANY_UNORDERED_NODE_TYPE, null )"
                         ".singleNodeValue;" % xpath)
       has_expected_host = bool(t.ExecuteJavascriptStatement(js_xpath_query))
       self.assertTrue(has_expected_host,
                       "Test host failed to appear in data use page")
 
 if __name__ == '__main__':
   IntegrationTest.RunAllTests()