customtabs: Add support for speculated_url in the benchmark scripts.

tools/android/loading/devtools_monitor.py

 # Copyright (c) 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.
 
 """Library handling DevTools websocket interaction.
 """
 
 import datetime
 import httplib
 import json
 import logging
 import os
 import sys
 import time
 
 file_dir = os.path.dirname(__file__)
 sys.path.append(os.path.join(file_dir, '..', '..', 'perf'))
-from chrome_telemetry_build import chromium_config
-sys.path.append(chromium_config.GetTelemetryDir())
+from core import path_util
+sys.path.append(path_util.GetTelemetryDir())
 
 from telemetry.internal.backends.chrome_inspector import inspector_websocket
 from telemetry.internal.backends.chrome_inspector import websocket
 
 import common_util
 
 
 DEFAULT_TIMEOUT_SECONDS = 10
 
 _WEBSOCKET_TIMEOUT_SECONDS = 10
@@ skipping 455 matching lines @@
       json_data: (dict) Parsed from a JSON file using the json module.
 
     Returns:
       a Track instance.
     """
     # There is no sensible way to deserialize this abstract class, but
     # subclasses are not required to define a deserialization method. For
     # example, for testing we have a FakeRequestTrack which is never
     # deserialized; instead fake instances are deserialized as RequestTracks.
     assert False