Force the video to go fullscreen when setting persistent video

content/browser/media/media_web_contents_observer.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_BROWSER_MEDIA_MEDIA_WEB_CONTENTS_OBSERVER_H_
 #define CONTENT_BROWSER_MEDIA_MEDIA_WEB_CONTENTS_OBSERVER_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 39 matching lines @@
   bool HasActiveEffectivelyFullscreenVideo() const;
 
   // WebContentsObserver implementation.
   void WebContentsDestroyed() override;
   void RenderFrameDeleted(RenderFrameHost* render_frame_host) override;
   bool OnMessageReceived(const IPC::Message& message,
                          RenderFrameHost* render_frame_host) override;
   void WasShown() override;
   void WasHidden() override;
 
+  // TODO(zqzhang): this method is temporarily in MediaWebContentsObserver as
+  // the effectively fullscreen video code is also here. We need to consider
+  // merging the logic of effectively fullscreen, hiding media controls and
+  // fullscreening video element to the same place.
+  void RequestPersistentVideo(bool value);
+
   bool has_audio_power_save_blocker_for_testing() const {
     return !!audio_power_save_blocker_;
   }
 
   bool has_video_power_save_blocker_for_testing() const {
     return !!video_power_save_blocker_;
   }
 
  protected:
   MediaSessionControllersManager* session_controllers_manager() {
@@ skipping 49 matching lines @@
   base::Optional<MediaPlayerId> fullscreen_player_;
 
   MediaSessionControllersManager session_controllers_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaWebContentsObserver);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_MEDIA_MEDIA_WEB_CONTENTS_OBSERVER_H_