Add newlines to the end of files where they were missing

ppapi/host/message_filter_host.cc

 // Copyright (c) 2012 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/host/message_filter_host.h"
 
 #include "ppapi/host/ppapi_host.h"
 #include "ppapi/host/resource_message_filter.h"
 
 namespace ppapi {
 namespace host {
 
 MessageFilterHost::MessageFilterHost(
     PpapiHost* host,
     PP_Instance instance,
     PP_Resource resource,
     const scoped_refptr<ResourceMessageFilter>& message_filter)
     : ResourceHost(host, instance, resource) {
   AddFilter(message_filter);
 }
 
 MessageFilterHost::~MessageFilterHost() {
 }
 
 }  // namespace host
-}  // namespace ppapi
+}  // namespace ppapi