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

chrome/browser/spellcheck_host.h

Index: chrome/browser/spellcheck_host.h
diff --git a/chrome/browser/spellcheck_host.h b/chrome/browser/spellcheck_host.h
index aad254af5556b98af9ef7be87700762bf6457004..1f09b3535f7a1c278e378c0abc1c3fdf2360632c 100644
--- a/chrome/browser/spellcheck_host.h
+++ b/chrome/browser/spellcheck_host.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2009 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.
 
@@ -89,7 +89,7 @@ class SpellCheckHost : public base::RefCountedThreadSafe<SpellCheckHost,
   // spellcheck dictionary; saves the dictionary to |data_|.
   virtual void OnURLFetchComplete(const URLFetcher* source,
                                   const GURL& url,
-                                  const URLRequestStatus& status,
+                                  const net::URLRequestStatus& status,
                                   int response_code,
                                   const ResponseCookies& cookies,
                                   const std::string& data);