Clovis: update resource sack to use new dependency graph.

tools/android/loading/test_utils.py

 # Copyright 2016 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.
 
 """Common utilities used in unit tests, within this directory."""
 
+import dependency_graph
 import devtools_monitor
 import loading_model
 import loading_trace
 import page_track
 import request_track
 import tracing
 import user_satisfied_lens
 
 
 class FakeRequestTrack(devtools_monitor.Track):
@@ skipping 142 matching lines @@
 
 class TestResourceGraph(loading_model.ResourceGraph):
   """Replace the default request lens in a ResourceGraph with our SimpleLens."""
   REQUEST_LENS = SimpleLens
 
   @classmethod
   def FromRequestList(cls, requests, page_events=None, trace_events=None):
     return cls(LoadingTraceFromEvents(requests, page_events, trace_events))
 
 
+class TestDependencyGraph(dependency_graph.RequestDependencyGraph):
+  """A dependency graph created from requests using a simple lens."""
+  def __init__(self, requests):
+    lens = SimpleLens(LoadingTraceFromEvents(requests))
+    super(TestDependencyGraph, self).__init__(requests, lens)
+
+
 class MockConnection(object):
   """Mock out connection for testing.
 
   Use Expect* for requests expecting a repsonse. SyncRequestNoResponse puts
   requests into no_response_requests_seen.
 
   TODO(mattcary): use a standard mock system (the back-ported python3
   unittest.mock? devil.utils.mock_calls?)
 
   """
@@ skipping 28 matching lines @@
     if not self._expected_responses[method]:
       del self._expected_responses[method]
     self._test_case.assertEqual(expected_params, params)
     return response
 
 
 class MockUserSatisfiedLens(user_satisfied_lens._UserSatisfiedLens):
   def _CalculateTimes(self, _):
     self._satisfied_msec = float('inf')
     self._event_msec = float('inf')