Keep auxilliary media objects on the heap always.

Source/modules/mediasource/MediaSource.cpp

 /*
  * Copyright (C) 2013 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 282 matching lines @@
 {
     ASSERT(m_isAddedToRegistry);
     m_isAddedToRegistry = false;
 }
 
 double MediaSource::duration() const
 {
     return isClosed() ? std::numeric_limits<float>::quiet_NaN() : m_webMediaSource->duration();
 }
 
-PassRefPtrWillBeRawPtr<TimeRanges> MediaSource::buffered() const
+TimeRanges* MediaSource::buffered() const
 {
     // Implements MediaSource algorithm for HTMLMediaElement.buffered.
     // https://dvcs.w3.org/hg/html-media/raw-file/default/media-source/media-source.html#htmlmediaelement-extensions
-    WillBeHeapVector<RefPtrWillBeMember<TimeRanges>> ranges(m_activeSourceBuffers->length());
+    HeapVector<Member<TimeRanges>> ranges(m_activeSourceBuffers->length());
     for (size_t i = 0; i < m_activeSourceBuffers->length(); ++i)
         ranges[i] = m_activeSourceBuffers->item(i)->buffered(ASSERT_NO_EXCEPTION);
 
     // 1. If activeSourceBuffers.length equals 0 then return an empty TimeRanges object and abort these steps.
     if (ranges.isEmpty())
         return TimeRanges::create();
 
     // 2. Let active ranges be the ranges returned by buffered for each SourceBuffer object in activeSourceBuffers.
     // 3. Let highest end time be the largest range end time in the active ranges.
     double highestEndTime = -1;
     for (size_t i = 0; i < ranges.size(); ++i) {
         unsigned length = ranges[i]->length();
         if (length)
             highestEndTime = std::max(highestEndTime, ranges[i]->end(length - 1, ASSERT_NO_EXCEPTION));
     }
 
     // Return an empty range if all ranges are empty.
     if (highestEndTime < 0)
         return TimeRanges::create();
 
     // 4. Let intersection ranges equal a TimeRange object containing a single range from 0 to highest end time.
-    RefPtrWillBeRawPtr<TimeRanges> intersectionRanges = TimeRanges::create(0, highestEndTime);
+    TimeRanges* intersectionRanges = TimeRanges::create(0, highestEndTime);
 
     // 5. For each SourceBuffer object in activeSourceBuffers run the following steps:
     bool ended = readyState() == endedKeyword();
     for (size_t i = 0; i < ranges.size(); ++i) {
         // 5.1 Let source ranges equal the ranges returned by the buffered attribute on the current SourceBuffer.
         TimeRanges* sourceRanges = ranges[i].get();
 
         // 5.2 If readyState is "ended", then set the end time on the last range in source ranges to highest end time.
         if (ended && sourceRanges->length())
             sourceRanges->add(sourceRanges->start(sourceRanges->length() - 1, ASSERT_NO_EXCEPTION), highestEndTime);
 
         // 5.3 Let new intersection ranges equal the the intersection between the intersection ranges and the source ranges.
         // 5.4 Replace the ranges in intersection ranges with the new intersection ranges.
         intersectionRanges->intersectWith(sourceRanges);
     }
 
-    return intersectionRanges.release();
+    return intersectionRanges;
 }
 
-PassRefPtrWillBeRawPtr<TimeRanges> MediaSource::seekable() const
+TimeRanges* MediaSource::seekable() const
 {
     // Implements MediaSource algorithm for HTMLMediaElement.seekable.
     // https://dvcs.w3.org/hg/html-media/raw-file/default/media-source/media-source.html#htmlmediaelement-extensions
 
     double sourceDuration = duration();
     // If duration equals NaN: Return an empty TimeRanges object.
     if (std::isnan(sourceDuration))
         return TimeRanges::create();
 
     // If duration equals positive Infinity:
     if (sourceDuration == std::numeric_limits<double>::infinity()) {
-        RefPtrWillBeRawPtr<TimeRanges> buffered = m_attachedElement->buffered();
+        TimeRanges* buffered = m_attachedElement->buffered();
 
         // 1. If the HTMLMediaElement.buffered attribute returns an empty TimeRanges object, then
         // return an empty TimeRanges object and abort these steps.
         if (buffered->length() == 0)
             return TimeRanges::create();
 
         // 2. Return a single range with a start time of 0 and an end time equal to the highest end
         // time reported by the HTMLMediaElement.buffered attribute.
         return TimeRanges::create(0, buffered->end(buffered->length() - 1, ASSERT_NO_EXCEPTION));
     }
@@ skipping 226 matching lines @@
 
     m_asyncEventQueue->enqueueEvent(event.release());
 }
 
 URLRegistry& MediaSource::registry() const
 {
     return MediaSourceRegistry::registry();
 }
 
 } // namespace blink