Don't show media controls when there is a persistent video.

content/public/common/web_preferences.h

 // Copyright 2014 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 CONTENT_PUBLIC_COMMON_WEB_PREFERENCES_H_
 #define CONTENT_PUBLIC_COMMON_WEB_PREFERENCES_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 266 matching lines @@
   // |enable_instant_source_buffer_gc| flag controls whether the GC is done
   // immediately on memory pressure notification or during the next SourceBuffer
   // append (slower, but is MSE-spec compliant).
   // TODO(servolk, asvitkine): Query the value directly when it is available in
   // the renderer process. See https://crbug.com/681160.
   bool enable_instant_source_buffer_gc;
 
   // Whether it is a presentation receiver.
   bool presentation_receiver;
 
+  // If disabled, media controls should never be used.
+  bool media_controls_enabled;
+
   // We try to keep the default values the same as the default values in
   // chrome, except for the cases where it would require lots of extra work for
   // the embedder to use the same default value.
   WebPreferences();
   WebPreferences(const WebPreferences& other);
   ~WebPreferences();
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_COMMON_WEB_PREFERENCES_H_