Add data reduction proxy integration tests for video compression.

tools/chrome_proxy/integration_tests/chrome_proxy_pagesets/video.py

+# Copyright 2015 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 VideoPage(page_module.Page):
+  """A test page containing a video.
+
+  Attributes:
+      use_chrome_proxy: If true, fetches use the data reduction proxy.
+        Otherwise, fetches are sent directly to the origin.
+  """
+
+  def __init__(self, url, page_set, use_chrome_proxy):
+    super(VideoPage, self).__init__(url=url, page_set=page_set)
+    self.use_chrome_proxy = use_chrome_proxy
+
+
+class VideoPageSet(page_set_module.PageSet):
+  """ Chrome proxy video tests.
+
+  Attributes:
+      mode: One of the following values:
+        'direct', to fetch all pages directly from the origin,
+        'proxied', to fetch all pages using the data reduction proxy, or
+        'compare', to fetch both 'direct' and 'proxied' and compare the results.
+  """
+  def __init__(self, mode):
+    super(VideoPageSet, self).__init__()
+
+    urls_list = [
+        'http://aws1.mdw.la/fwvideo/simple.html',
+    ]
+
+    for url in urls_list:

[sclittle, 2015/04/10 23:01:50]

Could you just have VideoDirectPageSet, etc. call the appropriate AddUserStory,
instead of having this for loop, and remove 'mode'?

[Tom Bergan, 2015/04/10 23:41:05]

Done.

+      if mode == 'direct':
+        self.AddUserStory(VideoPage(url, self, False))
+      elif mode == 'proxied':
+        self.AddUserStory(VideoPage(url, self, True))
+      elif mode == 'compare':
+        self.AddUserStory(VideoPage(url, self, False))
+        self.AddUserStory(VideoPage(url, self, True))
+      else:
+        raise Exception('unknown mode %s' % mode)
+
+
+class VideoDirectPageSet(VideoPageSet):
+  """ Chrome proxy video tests: direct fetch. """
+  def __init__(self):
+    super(VideoDirectPageSet, self).__init__('direct')
+
+
+class VideoProxiedPageSet(VideoPageSet):
+  """ Chrome proxy video tests: proxied fetch. """
+  def __init__(self):
+    super(VideoProxiedPageSet, self).__init__('proxied')
+
+
+class VideoComparePageSet(VideoPageSet):
+  """ Chrome proxy video tests: compare direct and proxied fetches. """
+  def __init__(self):
+    super(VideoComparePageSet, self).__init__('compare')