Web shell test to go back and forward.

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
new file mode 100644
index 0000000000000000000000000000000000000000..4b528978cae9de36bc96e5645baf6df99a4e21be
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+++ b/ios/web/shell/test/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_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_