Added several new bypass telemetry tests for the data reduction proxy

tools/chrome_proxy/integration_tests/chrome_proxy_pagesets/fallback.py

 # Copyright 2014 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.
 
 from telemetry.page import page as page_module
 from telemetry.page import page_set as page_set_module
 
 
-class BlockOncePage(page_module.Page):
-
+class FallbackPage(page_module.Page):
   def __init__(self, url, page_set):
-    super(BlockOncePage, self).__init__(url=url, page_set=page_set)
+    super(FallbackPage, self).__init__(url=url, page_set=page_set)
 
 
-class BlockOncePageSet(page_set_module.PageSet):
-
+class FallbackPageSet(page_set_module.PageSet):
   """ Chrome proxy test sites """
-
   def __init__(self):
-    super(BlockOncePageSet, self).__init__()
+    super(FallbackPageSet, self).__init__()
 
     urls_list = [
-      'http://check.googlezip.net/blocksingle',
+      'http://check.googlezip.net/fallback',
     ]
 
     for url in urls_list:
-      self.AddPage(BlockOncePage(url, self))
+      self.AddPage(FallbackPage(url, self))