Keep auxilliary media objects on the heap always.

Source/core/paint/MediaControlsPainter.cpp

 /*
  * Copyright (C) 2009 Apple Inc.
  * Copyright (C) 2009 Google 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.
@@ skipping 280 matching lines @@
     Color sliderBackgroundColor;
     if (!useNewUi)
         sliderBackgroundColor = Color(11, 11, 11);
     else
         sliderBackgroundColor = Color(0xda, 0xda, 0xda);
 
     paintRoundedSliderBackground(rect, style, context, sliderBackgroundColor);
 
     // Draw the buffered range. Since the element may have multiple buffered ranges and it'd be
     // distracting/'busy' to show all of them, show only the buffered range containing the current play head.
-    RefPtrWillBeRawPtr<TimeRanges> bufferedTimeRanges = mediaElement->buffered();
+    TimeRanges* bufferedTimeRanges = mediaElement->buffered();
     float duration = mediaElement->duration();
     float currentTime = mediaElement->currentTime();
     if (std::isnan(duration) || std::isinf(duration) || !duration || std::isnan(currentTime))
         return;
 
     for (unsigned i = 0; i < bufferedTimeRanges->length(); ++i) {
         float start = bufferedTimeRanges->start(i, ASSERT_NO_EXCEPTION);
         float end = bufferedTimeRanges->end(i, ASSERT_NO_EXCEPTION);
         // The delta is there to avoid corner cases when buffered
         // ranges is out of sync with current time because of
@@ skipping 258 matching lines @@
     }
 
     float zoomLevel = style.effectiveZoom();
     if (thumbImage) {
         style.setWidth(Length(static_cast<int>(width * zoomLevel), Fixed));
         style.setHeight(Length(static_cast<int>(height * zoomLevel), Fixed));
     }
 }
 
 } // namespace blink