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

chrome/common/net/url_fetcher.h

Index: chrome/common/net/url_fetcher.h
diff --git a/chrome/common/net/url_fetcher.h b/chrome/common/net/url_fetcher.h
index 924a6bc6ae4374dba74e97a48c4e1fd3c94ab65b..733fd92f28d083ed2d9aae698bc9237bb5051a50 100644
--- a/chrome/common/net/url_fetcher.h
+++ b/chrome/common/net/url_fetcher.h
@@ -1,4 +1,4 @@
-// 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.
 //
@@ -26,11 +26,11 @@ class GURL;
 typedef std::vector<std::string> ResponseCookies;
 class URLFetcher;
 class URLRequestContextGetter;
-class URLRequestStatus;
 
 namespace net {
 class HttpResponseHeaders;
-}
+class URLRequestStatus;
+}  // namespace net
 
 // To use this class, create an instance with the desired URL and a pointer to
 // the object to be notified when the URL has been loaded:
@@ -75,7 +75,7 @@ class URLFetcher {
     // URLFetcher instance is destroyed.
     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) = 0;