Refactor decorators into thier own python class

tools/chrome_proxy/webdriver/smoke.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 common
 import time
 from common import TestDriver
 from common import IntegrationTest
-from common import NotAndroid
+from decorators import NotAndroid
 
 
 class Smoke(IntegrationTest):
 
   # Ensure Chrome does not use DataSaver in Incognito mode.
   # Clank does not honor the --incognito flag.
   @NotAndroid
   def testCheckPageWithIncognito(self):
     with TestDriver() as t:
       t.AddChromeArg('--enable-spdy-proxy-auth')
       t.AddChromeArg('--incognito')
       t.LoadURL('http://check.googlezip.net/test.html')
       for response in t.GetHTTPResponses():
         self.assertNotHasChromeProxyViaHeader(response)
-  
+
   # Ensure Chrome uses DataSaver in normal mode.
   def testCheckPageWithNormalMode(self):
     with TestDriver() as t:
       t.AddChromeArg('--enable-spdy-proxy-auth')
       t.LoadURL('http://check.googlezip.net/test.html')
       responses = t.GetHTTPResponses()
       self.assertNotEqual(0, len(responses))
       for response in responses:
         self.assertHasChromeProxyViaHeader(response)
 
@@ skipping 43 matching lines @@
   # Ensure image, css, and javascript resources are compressed.
   def testCheckImageCssJavascriptIsCompressed(self):
     with TestDriver() as t:
       t.AddChromeArg('--enable-spdy-proxy-auth')
       t.LoadURL('http://check.googlezip.net/static')
       # http://check.googlezip.net/static is a test page that has
       # image/css/javascript resources.
       responses = t.GetHTTPResponses()
       self.assertNotEqual(0, len(responses))
       for response in responses:
-        self.assertHasChromeProxyViaHeader(response)        
+        self.assertHasChromeProxyViaHeader(response)
 
 if __name__ == '__main__':
   IntegrationTest.RunAllTests()