Refactor web shell integration tests utilities.

ios/web/shell/test/app/web_shell_test_util.h

Index: ios/web/shell/test/app/web_shell_test_util.h
diff --git a/ios/web/shell/test/app/web_shell_test_util.h b/ios/web/shell/test/app/web_shell_test_util.h
new file mode 100644
index 0000000000000000000000000000000000000000..2a88d2a4f83fae8f3e6af454113281d85f83dafa
--- /dev/null
+++ b/ios/web/shell/test/app/web_shell_test_util.h
@@ -0,0 +1,19 @@
+// 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_APP_WEB_SHELL_TEST_UTIL_H_
+#define IOS_WEB_SHELL_TEST_APP_WEB_SHELL_TEST_UTIL_H_
+
+#import "ios/web/public/web_state/web_state.h"
+
+namespace web {
+namespace web_shell_test_util {
+
+// Gets the current WebState for the web shell.
+web::WebState* GetCurrentWebState();
+
+}  // namespace web_shell_test_util
+}  // namespace web
+
+#endif  // IOS_WEB_SHELL_TEST_APP_WEB_SHELL_TEST_UTIL_H_