Upstream Chrome on iOS source code [10/11].

ios/chrome/test/app/signin_test_util.h

+// Copyright 2016 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.
+
+#ifndef IOS_CHROME_TEST_APP_SIGNIN_TEST_UTIL_H_
+#define IOS_CHROME_TEST_APP_SIGNIN_TEST_UTIL_H_
+
+namespace chrome_test_util {
+
+// Sets up mock authentication that will bypass the real ChromeIdentityService
+// and install a fake one.
+void SetUpMockAuthentication();
+
+// Tears down the fake ChromeIdentityService and restores the real one.
+void TearDownMockAuthentication();
+
+// Sets up a mock AccountReconcilor that will always succeed and won't use the
+// network.
+void SetUpMockAccountReconcilor();
+
+// Tears down the mock AccountReconcilor if it was previously set up.
+void TearDownMockAccountReconcilor();
+
+// Signs the user out and clears the known accounts entirely. Returns whether
+// the accounts were correctly removed from the keychain.
+bool SignOutAndClearAccounts();
+
+}  // namespace chrome_test_util
+
+#endif  // IOS_CHROME_TEST_APP_SIGNIN_TEST_UTIL_H_