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

chrome_frame/cfproxy.h

Index: chrome_frame/cfproxy.h
diff --git a/chrome_frame/cfproxy.h b/chrome_frame/cfproxy.h
index b32bf78b2660fa6516530610a35b55a9b0ed55f2..af863412c2b96c92ba839fd8360ae6844581a49f 100644
--- a/chrome_frame/cfproxy.h
+++ b/chrome_frame/cfproxy.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.
 
@@ -32,7 +32,6 @@ enum AutomationPageFontSize {
 class ChromeProxyDelegate;
 class ChromeProxyFactory;
 class GURL;
-class URLRequestStatus;
 struct AttachExternalTabParams;
 struct AutomationURLRequest;
 struct ExternalTabSettings;
@@ -40,6 +39,10 @@ struct MiniContextMenuParams;
 struct NavigationInfo;
 struct ProxyParams;
 
+namespace net {
+class URLRequestStatus;
+}  // namespace net
+
 // Some callers of synchronous messages wants a context to be passed back
 // in order to identify the call they made. Presumably one can make
 // multiple sync calls of same type (as async) and want to identify what