Mojo: Remove utility:: namespace

mojo/public/utility/environment.h

 // Copyright 2013 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.
 
 #ifndef MOJO_PUBLIC_UTILITY_ENVIRONMENT_H_
 #define MOJO_PUBLIC_UTILITY_ENVIRONMENT_H_
 
 #include "mojo/public/system/macros.h"
 
 namespace mojo {
-namespace utility {
 
 namespace internal {
 class BindingsSupportImpl;
 }  // namespace internal
 
 class RunLoop;
 
 // Use Environment to cofigure state.
 class Environment {
  public:
   Environment();
   ~Environment();
 
  private:
   internal::BindingsSupportImpl* bindings_support_;
 
   MOJO_DISALLOW_COPY_AND_ASSIGN(Environment);
 };
 
-}  // namespace utility
 }  // namespace mojo
 
 #endif  // MOJO_PUBLIC_UTILITY_ENVIRONMENT_H_