Use the mojo::shell namespace consistently underly shell/.

shell/application_manager/shell_impl.cc

 // Copyright 2015 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 "shell/application_manager/shell_impl.h"
 
 #include "mojo/common/common_type_converters.h"
 #include "mojo/services/content_handler/public/interfaces/content_handler.mojom.h"
 #include "shell/application_manager/application_manager.h"
 
 namespace mojo {
+namespace shell {
 
 ShellImpl::ShellImpl(ApplicationPtr application,
                      ApplicationManager* manager,
                      const GURL& requested_url,
                      const GURL& url)
     : manager_(manager),
       requested_url_(requested_url),
       url_(url),
       application_(application.Pass()),
       binding_(this) {
@@ skipping 27 matching lines @@
     return;
   }
   manager_->ConnectToApplication(app_gurl, url_, services.Pass(),
                                  exposed_services.Pass());
 }
 
 void ShellImpl::OnConnectionError() {
   manager_->OnShellImplError(this);
 }
 
+}  // namespace shell
 }  // namespace mojo