Adding two smoke tests for DataSaver:

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
 
@@ skipping 75 matching lines @@
       self.assertEqual(2, len(responses))
       for response in responses:
         chrome_proxy_header = response.request_headers['chrome-proxy']
         self.assertIn('s=', chrome_proxy_header)
         self.assertNotIn('ps=', chrome_proxy_header)
         self.assertNotIn('sid=', chrome_proxy_header)
         # Verify that the proxy server honored the session ID.
         self.assertHasChromeProxyViaHeader(response)
         self.assertEqual(200, response.status)
 
+  # Ensure the block is working

[RyanSturm, 2017/03/21 17:41:53]

nit: change the comment to "Ensure that block causes resources to load from the
origin directly."

+  def testCheckBlockIsWorking(self):
+    with TestDriver() as t:
+      t.AddChromeArg('--enable-spdy-proxy-auth')
+      t.LoadURL('http://check.googlezip.net/block')
+      responses = t.GetHTTPResponses()
+      self.assertNotEqual(0, len(responses))
+      for response in responses:
+        self.assertNotHasChromeProxyViaHeader(response)
+
+  # Ensure image/css/javascript is compressed

[RyanSturm, 2017/03/21 17:41:53]

nit: Change the comment to "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)        
+
 if __name__ == '__main__':
   IntegrationTest.RunAllTests()