diff --git a/ppapi/proxy/mock_resource.cc b/ppapi/proxy/mock_resource.cc
index 2173eea..06b22920 100644
--- a/ppapi/proxy/mock_resource.cc
+++ b/ppapi/proxy/mock_resource.cc
@@ -1,13 +1,10 @@
-// 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.
 
 #include "ppapi/proxy/mock_resource.h"
 
-using ppapi::HostResource;
-using ppapi::Resource;
-
-namespace pp {
+namespace ppapi {
 namespace proxy {
 
 MockResource::MockResource(const HostResource& resource) : Resource(resource) {
@@ -17,4 +14,4 @@
 }
 
 }  // namespace proxy
-}  // namespace pp
+}  // namespace ppapi