Add EGTests for passwords settings on iOS

ios/chrome/browser/ui/settings/password_details_collection_view_controller_for_testing.h

Index: ios/chrome/browser/ui/settings/password_details_collection_view_controller_for_testing.h
diff --git a/ios/chrome/browser/ui/settings/password_details_collection_view_controller_for_testing.h b/ios/chrome/browser/ui/settings/password_details_collection_view_controller_for_testing.h
new file mode 100644
index 0000000000000000000000000000000000000000..5a1dc387ad2d116957220a435ef70c2b5f41cfb1
--- /dev/null
+++ b/ios/chrome/browser/ui/settings/password_details_collection_view_controller_for_testing.h
@@ -0,0 +1,20 @@
+// Copyright 2017 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_BROWSER_UI_SETTINGS_PASSWORD_DETAILS_COLLECTION_VIEW_CONTROLLER_FOR_TESTING_H_
+#define IOS_CHROME_BROWSER_UI_SETTINGS_PASSWORD_DETAILS_COLLECTION_VIEW_CONTROLLER_FOR_TESTING_H_
+
+#import "ios/chrome/browser/ui/settings/password_details_collection_view_controller.h"
+
+@interface PasswordDetailsCollectionViewController (ForTesting)
+
+// Allows to replace a |reauthenticationModule| for a fake one in integration
+// tests, where the testing code cannot control the creation of the
+// controller.
+- (void)setReauthenticationModule:
+    (id<ReauthenticationProtocol>)reauthenticationModule;
+
+@end
+
+#endif  // IOS_CHROME_BROWSER_UI_SETTINGS_PASSWORD_DETAILS_COLLECTION_VIEW_CONTROLLER_FOR_TESTING_H_