[Android] Add a configurable environment for devil/.

tools/telemetry/catapult_base/dependency_manager/dependency_manager.py

 # Copyright 2015 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.
 
 import logging
 import os
 import stat
 
 from catapult_base import cloud_storage
 from catapult_base import support_binaries
@@ skipping 71 matching lines @@
             cloud_storage.
         ServerError: If an internal server error is hit while downloading the
             remote file.
         CloudStorageError: If another error occured while downloading the remote
             path.
         FileNotFoundError: If an attempted download was otherwise unsuccessful.
 
     """
     dependency_info = self._GetDependencyInfo(dependency, platform)
     if not dependency_info:
-      logging.error(
-          'The dependency_manager was not initialized with the dependency.')
       if not try_support_binaries:
         raise exceptions.NoPathFoundError(dependency, platform)
       # TODO(aiolos): Remove the support_binaries call and always raise
       # NoPathFound once the binary dependencies are moved over to the new
       # system.
 
       # platform should be of the form '%s_%s' % (os_name, arch_name) when
       # called from the binary_manager.
       platform_parts = platform.split('_', 1)
       assert len(platform_parts) == 2
@@ skipping 30 matching lines @@
         A path to an executable for |dependency| that will run on |platform|.
 
     Raises:
         NoPathFoundError: If a local copy of the executable cannot be found.
     """
     # TODO(aiolos): Remove the support_binaries call and always raise
     # NoPathFound once the binary dependencies are moved over to the new
     # system.
     dependency_info = self._GetDependencyInfo(dependency, platform)
     if not dependency_info:
-      logging.error(
-          'The dependency_manager was not initialized with the dependency.')
       if not try_support_binaries:
         raise exceptions.NoPathFoundError(dependency, platform)
       return support_binaries.FindLocallyBuiltPath(dependency)
     local_path = self._LocalPath(dependency_info)
     if not local_path or not os.path.exists(local_path):
       raise exceptions.NoPathFoundError(dependency, platform)
     return local_path
 
   def _UpdateDependencies(self, config):
     """Add the dependency information stored in |config| to this instance.
@@ skipping 103 matching lines @@
       os.makedirs(download_dir)
 
     cloud_storage.GetIfHashChanged(cs_path, download_path, cs_bucket, cs_hash)
     if not os.path.exists(download_path):
       raise exceptions.FileNotFoundError(download_path)
     #TODO(aiolos): Add support for unzipping files.
     os.chmod(download_path,
              stat.S_IRUSR | stat.S_IWUSR | stat.S_IXUSR | stat.S_IRGRP)
     return os.path.abspath(download_path)