Fix heapcheck errors

content/browser/streams/stream.h

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_BROWSER_STREAMS_STREAM_H_
 #define CONTENT_BROWSER_STREAMS_STREAM_H_
 
 #include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
+#include "base/memory/weak_ptr.h"
 #include "content/browser/download/byte_stream.h"
 #include "content/common/content_export.h"
 #include "googleurl/src/gurl.h"
 
 namespace net {
 class IOBuffer;
 }
 
 namespace content {
 
@@ skipping 64 matching lines @@
   scoped_refptr<net::IOBuffer> data_;
   size_t data_length_;
 
   scoped_ptr<ByteStreamWriter> writer_;
   scoped_ptr<ByteStreamReader> reader_;
 
   StreamRegistry* registry_;
   StreamReadObserver* read_observer_;
   StreamWriteObserver* write_observer_;
 
+  base::WeakPtrFactory<Stream> weak_ptr_factory_;
   DISALLOW_COPY_AND_ASSIGN(Stream);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_STREAMS_STREAM_H_