[Android] Add support for timeouts scaling for OnDevice instrumentation.

build/android/pylib/instrumentation/instrumentation_test_instance.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 collections
 import copy
 import logging
 import os
 import pickle
 import re
@@ skipping 26 matching lines @@
     'org.chromium.chrome.test.ChromeInstrumentationTestRunner.'
         + 'EnableTestHttpServer')
 _EXTRA_DRIVER_TEST_LIST = (
     'org.chromium.test.driver.OnDeviceInstrumentationDriver.TestList')
 _EXTRA_DRIVER_TEST_LIST_FILE = (
     'org.chromium.test.driver.OnDeviceInstrumentationDriver.TestListFile')
 _EXTRA_DRIVER_TARGET_PACKAGE = (
     'org.chromium.test.driver.OnDeviceInstrumentationDriver.TargetPackage')
 _EXTRA_DRIVER_TARGET_CLASS = (
     'org.chromium.test.driver.OnDeviceInstrumentationDriver.TargetClass')
+_EXTRA_TIMEOUT_SCALE = (
+    'org.chromium.test.driver.OnDeviceInstrumentationDriver.TimeoutScale')
+
 _PARAMETERIZED_TEST_ANNOTATION = 'ParameterizedTest'
 _PARAMETERIZED_TEST_SET_ANNOTATION = 'ParameterizedTest$Set'
 _NATIVE_CRASH_RE = re.compile('native crash', re.IGNORECASE)
 _PICKLE_FORMAT_VERSION = 10
 
 
 # TODO(jbudorick): Make these private class methods of
 # InstrumentationTestInstance once the instrumentation test_runner is
 # deprecated.
 def ParseAmInstrumentRawOutput(raw_output):
@@ skipping 542 matching lines @@
   def GetHttpServerEnvironmentVars():
     return {
       _EXTRA_ENABLE_HTTP_SERVER: None,
     }
 
   def GetDriverEnvironmentVars(
       self, test_list=None, test_list_file_path=None):
     env = {
       _EXTRA_DRIVER_TARGET_PACKAGE: self.test_package,
       _EXTRA_DRIVER_TARGET_CLASS: self.test_runner,
+      _EXTRA_TIMEOUT_SCALE: self._timeout_scale,
     }
 
     if test_list:
       env[_EXTRA_DRIVER_TEST_LIST] = ','.join(test_list)
 
     if test_list_file_path:
       env[_EXTRA_DRIVER_TEST_LIST_FILE] = (
           os.path.basename(test_list_file_path))
 
     return env
 
   @staticmethod
   def ParseAmInstrumentRawOutput(raw_output):
     return ParseAmInstrumentRawOutput(raw_output)
 
   @staticmethod
   def GenerateTestResults(
       result_code, result_bundle, statuses, start_ms, duration_ms):
     return GenerateTestResults(result_code, result_bundle, statuses,
                                start_ms, duration_ms)
 
   #override
   def TearDown(self):
     if self._isolate_delegate:
       self._isolate_delegate.Clear()