Add flag for enabling/disabling video fullscreen detection

chrome/browser/android/app_hooks_helper.h

+// Copyright 2017 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 CHROME_BROWSER_ANDROID_APP_HOOKS_HELPER_H_
+#define CHROME_BROWSER_ANDROID_APP_HOOKS_HELPER_H_
+
+#include <jni.h>
+#include "base/macros.h"
+
+namespace chrome {
+namespace android {
+
+class AppHooksHelper {

[David Trainor- moved to gerrit, 2017/03/09 17:15:30]

Should this just be AppHooks?  I'm fine either way though.

[Zhiqiang Zhang (Slow), 2017/03/14 13:15:28]

Done.

+ public:
+  static bool ShouldDetectVideoFullscreen();
+
+ private:
+  AppHooksHelper() {}
+  ~AppHooksHelper() {}
+  DISALLOW_COPY_AND_ASSIGN(AppHooksHelper);
+};
+
+}  // namespace android
+}  // namespace chrome
+
+#endif  // CHROME_BROWSER_ANDROID_APP_HOOKS_HELPER_H_