Integration tests for WebStateDelegate::OnAuthRequired callback.

ios/web/public/test/fakes/test_web_state_delegate.h

 // 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_WEB_PUBLIC_TEST_FAKES_TEST_WEB_STATE_DELEGATE_H_
 #define IOS_WEB_PUBLIC_TEST_FAKES_TEST_WEB_STATE_DELEGATE_H_
 
 #import <Foundation/Foundation.h>
 
 #include <memory>
@@ skipping 47 matching lines @@
   // called.
   bool get_java_script_dialog_presenter_called() const {
     return get_java_script_dialog_presenter_called_;
   }
 
   // Returns the last HTTP Authentication request passed to |OnAuthRequired|.
   TestAuthenticationRequest* last_authentication_request() const {
     return last_authentication_request_.get();
   }
 
+  // Clears the last HTTP Authentication request passed to |OnAuthRequired|.
+  void ClearLastAuthenticationRequest() {
+    last_authentication_request_.reset();
+  }
+
  private:
   bool load_progress_changed_called_ = false;
   bool handle_context_menu_called_ = false;
   bool get_java_script_dialog_presenter_called_ = false;
   TestJavaScriptDialogPresenter java_script_dialog_presenter_;
   std::unique_ptr<TestAuthenticationRequest> last_authentication_request_;
 };
 
 }  // namespace web
 
 #endif  // IOS_WEB_PUBLIC_TEST_FAKES_TEST_WEB_STATE_DELEGATE_H_