Reduce namespaces for ash::launcher::AppLauncherId

chrome/browser/ui/ash/app_launcher_id.h

 // 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.
 
 #ifndef CHROME_BROWSER_UI_ASH_APP_LAUNCHER_ID_H_
 #define CHROME_BROWSER_UI_ASH_APP_LAUNCHER_ID_H_
 
 #include <string>
 
 namespace ash {
-namespace launcher {
 
 // A unique chrome launcher id used to identify a shelf item. This class is a
 // wrapper for the chrome launcher identifier. |app_launcher_id_| includes the
 // |app_id| and the |launch_id|. The |app_id| is the application id associated
 // with a set of windows. The |launch_id| is an id that can be passed to an app
 // when launched in order to support multiple shelf items per app. This id is
 // used together with the |app_id| to uniquely identify each shelf item that
 // has the same |app_id|. The |app_id| must not be empty.
 class AppLauncherId {
  public:
@@ skipping 12 matching lines @@
   const std::string& launch_id() const { return launch_id_; }
 
  private:
   // The application id associated with a set of windows.
   std::string app_id_;
   // An id that can be passed to an app when launched in order to support
   // multiple shelf items per app.
   std::string launch_id_;
 };
 
-}  // namespace launcher
 }  // namespace ash
 
 #endif  // CHROME_BROWSER_UI_ASH_APP_LAUNCHER_ID_H_