Keep auxilliary media objects on the heap always.

Source/core/html/MediaController.h

 /*
  * Copyright (C) 2011 Apple Inc.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 31 matching lines @@
 class MediaController final : public RefCountedGarbageCollectedEventTargetWithInlineData<MediaController> {
     DEFINE_WRAPPERTYPEINFO();
     REFCOUNTED_GARBAGE_COLLECTED_EVENT_TARGET(MediaController);
 public:
     static MediaController* create(ExecutionContext*);
     ~MediaController() override;
 
     void addMediaElement(HTMLMediaElement*);
     void removeMediaElement(HTMLMediaElement*);
 
-    PassRefPtrWillBeRawPtr<TimeRanges> buffered() const;
-    PassRefPtrWillBeRawPtr<TimeRanges> seekable() const;
-    PassRefPtrWillBeRawPtr<TimeRanges> played();
+    TimeRanges* buffered() const;
+    TimeRanges* seekable() const;
+    TimeRanges* played();
 
     double duration() const;
     double currentTime() const;
     void setCurrentTime(double);
 
     bool paused() const { return m_paused; }
     void play();
     void pause();
     void unpause();
 
@@ skipping 61 matching lines @@
     mutable Timer<MediaController> m_clearPositionTimer;
     OwnPtr<Clock> m_clock;
     RawPtrWillBeWeakMember<ExecutionContext> m_executionContext;
     Timer<MediaController> m_timeupdateTimer;
     double m_previousTimeupdateTime;
 };
 
 } // namespace blink
 
 #endif // MediaController_h