Oilpan: have the media element safely close its MediaSource.

Source/modules/mediasource/SourceBufferList.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 28 matching lines @@
 
 SourceBufferList::SourceBufferList(ExecutionContext* context, GenericEventQueue* asyncEventQueue)
     : m_executionContext(context)
     , m_asyncEventQueue(asyncEventQueue)
 {
     ScriptWrappable::init(this);
 }
 
 SourceBufferList::~SourceBufferList()
 {
+#if !ENABLE(OILPAN)
     ASSERT(m_list.isEmpty());
+#endif
 }
 
 void SourceBufferList::add(SourceBuffer* buffer)
 {
     m_list.append(buffer);
     scheduleEvent(EventTypeNames::addsourcebuffer);
 }
 
 void SourceBufferList::remove(SourceBuffer* buffer)
 {
@@ skipping 30 matching lines @@
     return m_executionContext;
 }
 
 void SourceBufferList::trace(Visitor* visitor)
 {
     visitor->trace(m_list);
     EventTargetWithInlineData::trace(visitor);
 }
 
 } // namespace WebCore