Reduce ActiveDOMObjects from core/

third_party/WebKit/Source/core/streams/Stream.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 19 matching lines @@
 
 #include "core/streams/Stream.h"
 
 #include "platform/blob/BlobData.h"
 #include "platform/blob/BlobRegistry.h"
 #include "platform/blob/BlobURL.h"
 
 namespace blink {
 
 Stream::Stream(ExecutionContext* context, const String& mediaType)
-    : ActiveDOMObject(context)
+    : ContextLifecycleObserver(context)
     , m_mediaType(mediaType)
     , m_isNeutered(false)
 {
     // Create a new internal URL for a stream and register it with the provided
     // media type.
     m_internalURL = BlobURL::createInternalStreamURL();
     BlobRegistry::registerStreamURL(m_internalURL, m_mediaType);
 }
 
 void Stream::addData(const char* data, size_t len)
@@ skipping 17 matching lines @@
 void Stream::abort()
 {
     BlobRegistry::abortStream(m_internalURL);
 }
 
 Stream::~Stream()
 {
     BlobRegistry::unregisterStreamURL(m_internalURL);
 }
 
-void Stream::suspend()
-{
-}
-
-void Stream::resume()
-{
-}
-
-void Stream::stop()
+void Stream::contextDestroyed()
 {
     neuter();
     abort();
 }
 
 DEFINE_TRACE(Stream)
 {
-    ActiveDOMObject::trace(visitor);
+    ContextLifecycleObserver::trace(visitor);
 }
 
 } // namespace blink