Adds support for the DHCP portion of the WPAD (proxy auto-discovery) protocol.

net/proxy/proxy_script_fetcher_impl.h

 // Copyright (c) 2011 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_PROXY_PROXY_SCRIPT_FETCHER_IMPL_H_
 #define NET_PROXY_PROXY_SCRIPT_FETCHER_IMPL_H_
 #pragma once
 
 #include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
@@ skipping 27 matching lines @@
   virtual ~ProxyScriptFetcherImpl();
 
   // Used by unit-tests to modify the default limits.
   base::TimeDelta SetTimeoutConstraint(base::TimeDelta timeout);
   size_t SetSizeConstraint(size_t size_bytes);
 
   virtual void OnResponseCompleted(URLRequest* request);
 
   // ProxyScriptFetcher methods:
   virtual int Fetch(const GURL& url, string16* text,
-                    CompletionCallback* callback);
-  virtual void Cancel();
-  virtual URLRequestContext* GetRequestContext();
+                    CompletionCallback* callback) OVERRIDE;
+  virtual void Cancel() OVERRIDE;
+  virtual URLRequestContext* GetRequestContext() const OVERRIDE;
 
   // URLRequest::Delegate methods:
   virtual void OnAuthRequired(URLRequest* request,
                               AuthChallengeInfo* auth_info);
   virtual void OnSSLCertificateError(URLRequest* request, int cert_error,
                                      X509Certificate* cert);
   virtual void OnResponseStarted(URLRequest* request);
   virtual void OnReadCompleted(URLRequest* request, int num_bytes);
 
  private:
@@ skipping 55 matching lines @@
 
   // The maximum amount of time to wait for download to complete.
   base::TimeDelta max_duration_;
 
   DISALLOW_COPY_AND_ASSIGN(ProxyScriptFetcherImpl);
 };
 
 }  // namespace net
 
 #endif  // NET_PROXY_PROXY_SCRIPT_FETCHER_IMPL_H_