Nukes view_manager namespace

mojo/services/public/cpp/view_manager/lib/view_private.cc

 // Copyright 2014 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 "mojo/services/public/cpp/view_manager/lib/view_private.h"
 
 namespace mojo {
-namespace view_manager {
 
 ViewPrivate::ViewPrivate(View* view)
     : view_(view) {
 }
 
 ViewPrivate::~ViewPrivate() {
 }
 
 // static
 View* ViewPrivate::LocalCreate() {
   return new View;
 }
 
-}  // namespace view_manager
 }  // namespace mojo