Remove unneeded uses of base/ref_counted.h.

net/http/http_auth.h

 // Copyright (c) 2006-2008 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 NET_HTTP_HTTP_AUTH_H_
 #define NET_HTTP_HTTP_AUTH_H_
 
-#include "base/ref_counted.h"
 #include "net/http/http_util.h"
 
+template <class T> class scoped_refptr;
+
 namespace net {
 
 class HttpAuthHandler;
 class HttpResponseHeaders;
 
 // Utility class for http authentication.
 class HttpAuth {
  public:
 
    // Http authentication can be done the the proxy server, origin server,
@@ skipping 133 matching lines @@
     std::string::const_iterator value_begin_;
     std::string::const_iterator value_end_;
 
     bool value_is_quoted_;
   };
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_HTTP_AUTH_H_