Added integration tests for falling back from the HTTP proxy to direct.

tools/chrome_proxy/integration_tests/chrome_proxy_pagesets/http_to_direct_fallback.py

Index: tools/chrome_proxy/integration_tests/chrome_proxy_pagesets/http_to_direct_fallback.py
diff --git a/tools/chrome_proxy/integration_tests/chrome_proxy_pagesets/http_to_direct_fallback.py b/tools/chrome_proxy/integration_tests/chrome_proxy_pagesets/http_to_direct_fallback.py
new file mode 100644
index 0000000000000000000000000000000000000000..c0b43ce67c91dca70ceab3a75e66b94326a7c47e
--- /dev/null
+++ b/tools/chrome_proxy/integration_tests/chrome_proxy_pagesets/http_to_direct_fallback.py
@@ -0,0 +1,29 @@
+# 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 HTTPToDirectFallbackPage(page_module.Page):
+  """Page that tests falling back from the HTTP proxy to a direct connection."""
+  def __init__(self, url, page_set):
+    super(HTTPToDirectFallbackPage, self).__init__(url=url, page_set=page_set)
+    # By making the startup URL trigger a proxy fallback, the test will use the
+    # HTTP fallback proxy.
+    self.startup_url = 'http://check.googlezip.net/fallback'
+
+
+class HTTPToDirectFallbackPageSet(page_set_module.PageSet):
+  """Chrome proxy test sites"""
+  def __init__(self):
+    super(HTTPToDirectFallbackPageSet, self).__init__()
+
+    urls_list = [
+      'http://check.googlezip.net/fallback',
+      'http://aws1.mdw.la/bypass',
+    ]
+
+    for url in urls_list:
+      self.AddPage(HTTPToDirectFallbackPage(url, self))