Fix header guard for navigation_test_util.h

ios/web/public/test/navigation_test_util.h

Index: ios/web/public/test/navigation_test_util.h
diff --git a/ios/web/public/test/navigation_test_util.h b/ios/web/public/test/navigation_test_util.h
index 3fe85f5f55963c7f38c390daf5476900b5a842c8..099d758ff049c722461c02bfef3591303bfeaf5b 100644
--- a/ios/web/public/test/navigation_test_util.h
+++ b/ios/web/public/test/navigation_test_util.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef IOS_WEB_SHELL_PUBLIC_TEST_NAVIGATION_TEST_UTIL_H_
-#define IOS_WEB_SHELL_PUBLIC_TEST_NAVIGATION_TEST_UTIL_H_
+#ifndef IOS_WEB_PUBLIC_TEST_NAVIGATION_TEST_UTIL_H_
+#define IOS_WEB_PUBLIC_TEST_NAVIGATION_TEST_UTIL_H_
 
 #import "ios/web/public/web_state/web_state.h"
 #include "url/gurl.h"
@@ -17,4 +17,4 @@ void LoadUrl(web::WebState* web_state, const GURL& url);
 }  // namespace test
 }  // namespace web
 
-#endif  // IOS_WEB_SHELL_PUBLIC_TEST_NAVIGATION_TEST_UTIL_H_
+#endif  // IOS_WEB_PUBLIC_TEST_NAVIGATION_TEST_UTIL_H_