Fix IOBuffer leak in CertificateResourceHandler and StreamResourceHandler.

content/browser/loader/stream_resource_handler.cc

 // 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.
 
 #include "content/browser/loader/stream_resource_handler.h"
 
 #include "base/guid.h"
 #include "base/logging.h"
 #include "content/browser/streams/stream.h"
 #include "content/browser/streams/stream_registry.h"
@@ skipping 70 matching lines @@
                                             int bytes_read,
                                             bool* defer) {
   if (!bytes_read)
     return true;
 
   // We have more data to read.
   DCHECK(read_buffer_.get());
 
   // Release the ownership of the buffer, and store a reference
   // to it. A new one will be allocated in OnWillRead().
-  net::IOBuffer* buffer = NULL;
-  read_buffer_.swap(&buffer);
+  scoped_refptr<net::IOBuffer> buffer;
+  read_buffer_.swap(buffer);
   stream_->AddData(buffer, bytes_read);
 
   if (!stream_->can_add_data())
     *defer = true;
 
   return true;
 }
 
 void StreamResourceHandler::OnResponseCompleted(
     int request_id,
@@ skipping 11 matching lines @@
 
 void StreamResourceHandler::OnSpaceAvailable(Stream* stream) {
   controller()->Resume();
 }
 
 void StreamResourceHandler::OnClose(Stream* stream) {
   controller()->Cancel();
 }
 
 }  // namespace content