[Android] Add support for external sharding to the test runner.

build/android/pylib/gtest/gtest_test_instance.py

 # Copyright 2014 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 HTMLParser
 import logging
 import os
 import re
 import tempfile
 import threading
@@ skipping 244 matching lines @@
   return test_name
 
 class GtestTestInstance(test_instance.TestInstance):
 
   def __init__(self, args, data_deps_delegate, error_func):
     super(GtestTestInstance, self).__init__()
     # TODO(jbudorick): Support multiple test suites.
     if len(args.suite_name) > 1:
       raise ValueError('Platform mode currently supports only 1 gtest suite')
     self._exe_dist_dir = None
+    self._external_shard_index = args.test_launcher_shard_index
     self._extract_test_list_from_filter = args.extract_test_list_from_filter
+    self._filter_tests_lock = threading.Lock()
     self._shard_timeout = args.shard_timeout
     self._store_tombstones = args.store_tombstones
+    self._total_external_shards = args.test_launcher_total_shards
     self._suite = args.suite_name[0]
-    self._filter_tests_lock = threading.Lock()
 
     # GYP:
     if args.executable_dist_dir:
       self._exe_dist_dir = os.path.abspath(args.executable_dist_dir)
     else:
       # TODO(agrieve): Remove auto-detection once recipes pass flag explicitly.
       exe_dist_dir = os.path.join(constants.GetOutDirectory(),
                                   '%s__dist' % self._suite)
 
       if os.path.exists(exe_dist_dir):
@@ skipping 79 matching lines @@
 
   @property
   def enable_xml_result_parsing(self):
     return self._enable_xml_result_parsing
 
   @property
   def exe_dist_dir(self):
     return self._exe_dist_dir
 
   @property
+  def external_shard_index(self):
+    return self._external_shard_index
+
+  @property
+  def extract_test_list_from_filter(self):
+    return self._extract_test_list_from_filter
+
+  @property
   def extras(self):
     return self._extras
 
   @property
   def gtest_also_run_disabled_tests(self):
     return self._run_disabled
 
   @property
   def gtest_filter(self):
     return self._gtest_filter
@@ skipping 24 matching lines @@
 
   @property
   def test_apk_incremental_install_script(self):
     return self._test_apk_incremental_install_script
 
   @property
   def test_arguments(self):
     return self._test_arguments
 
   @property
-  def extract_test_list_from_filter(self):
-    return self._extract_test_list_from_filter
+  def total_external_shards(self):
+    return self._total_external_shards
 
   #override
   def TestType(self):
     return 'gtest'
 
   #override
   def SetUp(self):
     """Map data dependencies via isolate."""
     self._data_deps.extend(
         self._data_deps_delegate(self._runtime_deps_path))
@@ skipping 60 matching lines @@
             '%s' % l for l in (line.strip() for line in disabled_tests_file)
             if l and not l.startswith('#')]
 
     return '*-%s' % ':'.join(disabled_filter_items)
 
   #override
   def TearDown(self):
     """Do nothing."""
     pass