[Android] Add a configurable environment for devil/.

build/android/pylib/perf/test_runner.py

 # Copyright 2013 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.
 
 """Runs perf tests.
 
 Our buildbot infrastructure requires each slave to run steps serially.
 This is sub-optimal for android, where these steps can run independently on
 multiple connected devices.
 
@@ skipping 56 matching lines @@
 from pylib import forwarder
 from pylib.base import base_test_result
 from pylib.base import base_test_runner
 
 
 # Regex for the master branch commit position.
 _GIT_CR_POS_RE = re.compile(r'^Cr-Commit-Position: refs/heads/master@{#(\d+)}$')
 
 
 def _GetChromiumRevision():
+  # pylint: disable=line-too-long
   """Get the git hash and commit position of the chromium master branch.
 
   See: https://chromium.googlesource.com/chromium/tools/build/+/master/scripts/slave/runtest.py#212
 
   Returns:
     A dictionary with 'revision' and 'commit_pos' keys.
   """
+  # pylint: enable=line-too-long
   status, output = cmd_helper.GetCmdStatusAndOutput(
       ['git', 'log', '-n', '1', '--pretty=format:%H%n%B', 'HEAD'],
       constants.DIR_SOURCE_ROOT)
   revision = None
   commit_pos = None
   if not status:
     lines = output.splitlines()
     revision = lines[0]
     for line in reversed(lines):
       m = _GIT_CR_POS_RE.match(line.strip())
@@ skipping 345 matching lines @@
     Returns:
       A tuple of (TestRunResults, retry).
     """
     _, result_type = self._LaunchPerfTest(test_name)
     results = base_test_result.TestRunResults()
     results.AddResult(base_test_result.BaseTestResult(test_name, result_type))
     retry = None
     if not results.DidRunPass():
       retry = test_name
     return results, retry