Implement the BadHTTPSFallback Integration Test with ChromeDriver

tools/chrome_proxy/webdriver/bypass.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
 from common import TestDriver
 from common import IntegrationTest
 
 
 class Bypass(IntegrationTest):
@@ skipping 154 matching lines @@
     # through the proxy without being bypassed.
     with TestDriver() as test_driver:
       test_driver.AddChromeArg('--enable-spdy-proxy-auth')
 
       test_driver.LoadURL('http://check.googlezip.net/exp/')
       responses = test_driver.GetHTTPResponses()
       self.assertNotEqual(0, len(responses))
       for response in responses:
         self.assertHasChromeProxyViaHeader(response)
 
+  # Data Saver uses a HTTPS proxy by default, if that fails it will fall back to
+  # a HTTP proxy.
+  def testBadHTTPSFallback(self):
+    with TestDriver() as test_driver:
+      test_driver.AddChromeArg('--enable-spdy-proxy-auth')
+      # Set the primary (HTTPS) proxy to a bad one.  
+      # That will force Data Saver to the HTTP proxy for normal page requests.
+      test_driver.AddChromeArg('--spdy-proxy-auth-origin='
+                               'https://nonexistent.googlezip.net')          
+      test_driver.AddChromeArg('--data-reduction-proxy-http-proxies='
+                               'http://compress.googlezip.net')  
+          
+      test_driver.LoadURL('http://check.googlezip.net/fallback/')
+      responses = test_driver.GetHTTPResponses()      
+      self.assertNotEqual(0, len(responses))
+      for response in responses:        
+        self.assertEqual(80, response.port)        
 
 if __name__ == '__main__':
-  IntegrationTest.RunAllTests()
+  IntegrationTest.RunAllTests()