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

net/url_request/url_request_ftp_job.h

Index: net/url_request/url_request_ftp_job.h
diff --git a/net/url_request/url_request_ftp_job.h b/net/url_request/url_request_ftp_job.h
index d50376631af1129eeb3559784f2329450f1d4c0d..ed65214c062e0991f9513394e8b24da7b9a8f51b 100644
--- a/net/url_request/url_request_ftp_job.h
+++ b/net/url_request/url_request_ftp_job.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.
 
@@ -16,10 +16,10 @@
 #include "net/ftp/ftp_transaction.h"
 #include "net/url_request/url_request_job.h"
 
-class URLRequestContext;
-
 namespace net {
 
+class URLRequestContext;
+
 // A URLRequestJob subclass that is built on top of FtpTransaction. It
 // provides an implementation for FTP.
 class URLRequestFtpJob : public URLRequestJob {