customtabs: Add support for speculated_url in the benchmark scripts.

tools/android/loading/sandwich_metrics.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.
 
 """Pull a sandwich run's output directory's metrics from traces into a CSV.
 
 python pull_sandwich_metrics.py -h
 """
 
 import collections
 import json
 import logging
 import os
 import shutil
 import subprocess
 import sys
 import tempfile
 
 _SRC_DIR = os.path.abspath(os.path.join(
     os.path.dirname(__file__), '..', '..', '..'))
 
 sys.path.append(os.path.join(_SRC_DIR, 'tools', 'perf'))
-from chrome_telemetry_build import chromium_config
+from core import path_util
+sys.path.append(path_util.GetTelemetryDir())
 
-sys.path.append(chromium_config.GetTelemetryDir())
 from telemetry.internal.image_processing import video
 from telemetry.util import image_util
 from telemetry.util import rgba_color
 
 import common_util
 import loading_trace as loading_trace_module
 import sandwich_runner
 import tracing_track
 
 
@@ skipping 300 matching lines @@
     except video.BoundingBoxNotFoundException:
       # Sometimes the bounding box for the web content area is not present. Skip
       # calculating Speed Index.
       run_metrics['speed_index'] = _FAILED_CSV_VALUE
   else:
     run_metrics['speed_index'] = _UNAVAILABLE_CSV_VALUE
   for key, value in trace.metadata['network_emulation'].iteritems():
     run_metrics['net_emul.' + key] = value
   assert set(run_metrics.keys()) == set(COMMON_CSV_COLUMN_NAMES)
   return run_metrics