Refactor decorators into thier own python class

tools/chrome_proxy/webdriver/compression_regression.py

 # Copyright 2017 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 datetime
 import json
 import math
 import subprocess
 import time
 
 import common
 from common import TestDriver
 from common import IntegrationTest
-from common import NotAndroid
+from decorators import NotAndroid
 
 # The maximum number of data points that will be saved.
 MAX_DATA_POINTS = 365
 
 # The number of days in the past to compute the average of for regression
 # alerting.
 ALERT_WINDOW = 31
 
 # The amount of tolerable difference a single data point can be away from the
 # average without alerting. This is a percentage from 0.0 to 1.0 inclusive.
@@ skipping 346 matching lines @@
     for i in range(ALERT_WINDOW):
       date_obj = start_date + datetime.timedelta(days=i)
       datestamp = date_obj.strftime(DATE_FORMAT)
       data[datestamp] = {'mp4': 0.9}
     self.assertRaises(Exception, self.checkForRegression, data, {'mp4':
       (0.9 - THRESHOLD - 0.01)})
 
 
 if __name__ == '__main__':
   IntegrationTest.RunAllTests()