Copy expect_tests from build

expect_tests/__init__.py

Index: expect_tests/__init__.py
diff --git a/expect_tests/__init__.py b/expect_tests/__init__.py
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+# 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.
+
+"""
+A parallelized, coverage-collecting, expectation-based testing framework.
+"""
+
+__version__ = '0.1'
+__author__ = 'The Chromium Infrastructure Team'
+__email__ = 'infra-dev@chromium.org'
+__url__ = 'https://chromium.googlesource.com/infra/testing/expect_tests/'
+
+from expect_tests.main import main
+from expect_tests.type_definitions import Test, Result, FuncCall, Bind
+from expect_tests.unittest_helper import UnitTestModule, UnittestTestCase
+
+from expect_tests.util import covers