[Chromecast] Enable browser media tests to work on internal builds

chromecast/browser/test/chromecast_browser_test_helper.h

+// 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 CHROMECAST_BROWSER_TEST_CHROMECAST_BROWSER_TEST_HELPER_H_
+#define CHROMECAST_BROWSER_TEST_CHROMECAST_BROWSER_TEST_HELPER_H_
+
+#include <memory>
+
+class GURL;
+
+namespace content {
+class WebContents;
+}
+
+namespace chromecast {
+namespace shell {
+
+class ChromecastBrowserTestHelper {
+ public:
+  // Creates an implementation of ChromecastBrowserTestHelper. Allows public
+  // and internal builds to instantiate different implementations.
+  static std::unique_ptr<ChromecastBrowserTestHelper> Create();
+
+  virtual ~ChromecastBrowserTestHelper() {}
+  virtual content::WebContents* NavigateToURL(const GURL& url) = 0;
+};
+
+}  // namespace shell
+}  // namespace chromecast
+
+#endif  // CHROMECAST_BROWSER_TEST_CHROMECAST_BROWSER_TEST_HELPER_H_