Inherits SupportsWeakPtr<T> instead of having WeakPtrFactory<T>

content/browser/ssl/ssl_cert_error_handler.h

 // 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.
 
 #ifndef CONTENT_BROWSER_SSL_SSL_CERT_ERROR_HANDLER_H_
 #define CONTENT_BROWSER_SSL_SSL_CERT_ERROR_HANDLER_H_
 #pragma once
 
 #include <string>
 
 #include "base/memory/weak_ptr.h"
 #include "content/browser/ssl/ssl_error_handler.h"
 #include "net/base/ssl_info.h"
 
 // A CertError represents an error that occurred with the certificate in an
 // SSL session.  A CertError object exists both on the IO thread and on the UI
 // thread and allows us to cancel/continue a request it is associated with.
 class SSLCertErrorHandler : public SSLErrorHandler {
  public:
   // Construct on the IO thread.
-  SSLCertErrorHandler(base::WeakPtr<Delegate> delegate,
+  SSLCertErrorHandler(const base::WeakPtr<Delegate>& delegate,
                       const content::GlobalRequestID& id,
                       ResourceType::Type resource_type,
                       const GURL& url,
                       int render_process_id,
                       int render_view_id,
                       const net::SSLInfo& ssl_info,
                       bool fatal);
 
   virtual SSLCertErrorHandler* AsSSLCertErrorHandler() OVERRIDE;
 
@@ skipping 13 matching lines @@
   // These read-only members may be accessed on any thread.
   const net::SSLInfo ssl_info_;
   const int cert_error_;  // The error we represent.
   const bool fatal_;  // True if the error is from a host requiring
                       // certificate errors to be fatal.
 
   DISALLOW_COPY_AND_ASSIGN(SSLCertErrorHandler);
 };
 
 #endif  // CONTENT_BROWSER_SSL_SSL_CERT_ERROR_HANDLER_H_