net: Add namespace net to the remaining files under url_request directory.

net/proxy/proxy_script_fetcher.h

-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// 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.
 
 // ProxyScriptFetcher is an async interface for fetching a proxy auto config
 // script. It is specific to fetching a PAC script; enforces timeout, max-size,
 // status code.
 
 #ifndef NET_PROXY_PROXY_SCRIPT_FETCHER_H_
 #define NET_PROXY_PROXY_SCRIPT_FETCHER_H_
 #pragma once
 
 #include "base/string16.h"
 #include "net/base/completion_callback.h"
 
 class GURL;
-class URLRequestContext;
 
 namespace net {
 
+class URLRequestContext;
+
 // Interface for downloading a PAC script. Implementations can enforce
 // timeouts, maximum size constraints, content encoding, etc..
 class ProxyScriptFetcher {
  public:
   // Destruction should cancel any outstanding requests.
   virtual ~ProxyScriptFetcher() {}
 
   // Downloads the given PAC URL, and invokes |callback| on completion.
   // On success |callback| is executed with a result code of OK, |*utf16_text|
   // is filled with the response. On failure, the result text is
@@ skipping 16 matching lines @@
   virtual void Cancel() = 0;
 
   // Returns the request context that this fetcher uses to issue downloads,
   // or NULL.
   virtual URLRequestContext* GetRequestContext() = 0;
 };
 
 }  // namespace net
 
 #endif  // NET_PROXY_PROXY_SCRIPT_FETCHER_H_