Fix IOBuffer leak in CertificateResourceHandler and StreamResourceHandler.

content/browser/loader/certificate_resource_handler.cc

 // Copyright (c) 2012 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/certificate_resource_handler.h"
 
 #include "base/strings/string_util.h"
 #include "content/browser/loader/resource_request_info_impl.h"
 #include "content/public/browser/content_browser_client.h"
 #include "content/public/common/resource_response.h"
@@ skipping 73 matching lines @@
                                                 bool* defer) {
   if (!bytes_read)
     return true;
 
   // We have more data to read.
   DCHECK(read_buffer_.get());
   content_length_ += bytes_read;
 
   // 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);
   // TODO(gauravsh): Should this be handled by a separate thread?
   buffer_.push_back(std::make_pair(buffer, bytes_read));
 
   return true;
 }
 
 void CertificateResourceHandler::OnResponseCompleted(
     int request_id,
     const net::URLRequestStatus& urs,
     const std::string& sec_info,
@@ skipping 38 matching lines @@
   DCHECK_EQ(content_length_, bytes_copied);
 }
 
 void CertificateResourceHandler::OnDataDownloaded(
     int request_id,
     int bytes_downloaded) {
   NOTREACHED();
 }
 
 }  // namespace content