Add GetCurrentNativeController to webstate.

ios/web/public/test/native_controller_test_util.h

Index: ios/web/public/test/native_controller_test_util.h
diff --git a/ios/web/public/test/native_controller_test_util.h b/ios/web/public/test/native_controller_test_util.h
new file mode 100644
index 0000000000000000000000000000000000000000..d7c6e8828563f5147333f81fc93c5aca084a388a
--- /dev/null
+++ b/ios/web/public/test/native_controller_test_util.h
@@ -0,0 +1,20 @@
+// 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_PUBLIC_TEST_NATIVE_CONTROLLER_TEST_UTIL_H_

[Eugene But (OOO till 7-30), 2016/08/26 00:44:05]

IOS_WEB_PUBLIC_TEST_NATIVE_CONTROLLER_TEST_UTIL_H_

[justincohen, 2016/08/26 15:40:42]

Weird, why didn't presubmit catch this?

+#define IOS_WEB_SHELL_PUBLIC_TEST_NATIVE_CONTROLLER_TEST_UTIL_H_
+
+#import "ios/web/public/web_state/web_state.h"
+
+namespace web {
+namespace test {
+
+// Returns the native controller of the current tab if the current tab is

[Eugene But (OOO till 7-30), 2016/08/26 00:44:05]

s/the current tab if the current tab is a new tab and nil otherwise./the given
|web_state|.

[justincohen, 2016/08/26 15:40:42]

Done.

+// a new tab and nil otherwise.
+id GetCurrentNativeController(WebState* web_state);

[Eugene But (OOO till 7-30), 2016/08/26 00:44:05]

id<CRWNativeContent> ?

[justincohen, 2016/08/26 15:40:42]

Done.

+
+}  // namespace test
+}  // namespace web
+
+#endif  // IOS_WEB_SHELL_PUBLIC_TEST_NATIVE_CONTROLLER_TEST_UTIL_H_