Refactor web shell integration tests utilities.

ios/web/shell/test/web_shell_test_util.h

Index: ios/web/shell/test/web_shell_test_util.h
diff --git a/ios/web/shell/test/web_shell_test_util.h b/ios/web/shell/test/web_shell_test_util.h
deleted file mode 100644
index 4b528978cae9de36bc96e5645baf6df99a4e21be..0000000000000000000000000000000000000000
--- a/ios/web/shell/test/web_shell_test_util.h
+++ /dev/null
@@ -1,19 +0,0 @@
-// 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_WEB_SHELL_TEST_WEB_SHELL_TEST_UTIL_H_
-#define IOS_WEB_SHELL_TEST_WEB_SHELL_TEST_UTIL_H_
-
-#import "ios/web/shell/view_controller.h"
-
-namespace web {
-namespace web_shell_test_util {
-
-// Gets the current ViewController for the web shell.
-ViewController* GetCurrentViewController();
-
-}  // namespace web_shell_test_util
-}  // namespace web
-
-#endif  // IOS_WEB_SHELL_TEST_WEB_SHELL_TEST_UTIL_H_