Reduce namespaces for ash::launcher::AppLauncherId

chrome/browser/ui/ash/app_launcher_id.cc

 // Copyright 2017 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 "chrome/browser/ui/ash/app_launcher_id.h"
 
 #include "base/logging.h"
 
 namespace ash {
-namespace launcher {
 
 AppLauncherId::AppLauncherId(const std::string& app_id,
                              const std::string& launch_id)
     : app_id_(app_id), launch_id_(launch_id) {
   DCHECK(!app_id.empty());
 }
 
 AppLauncherId::AppLauncherId(const std::string& app_id) : app_id_(app_id) {
   DCHECK(!app_id.empty());
 }
 
 AppLauncherId::AppLauncherId() {}
 
 AppLauncherId::~AppLauncherId() {}
 
-}  // namespace launcher
 }  // namespace ash