Move shell service to toplevel shell namespace

services/shell/tests/connect/connect_test_singleton_app.cc

 // Copyright 2016 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 "base/macros.h"
 #include "mojo/public/c/system/main.h"
 #include "services/shell/public/cpp/application_runner.h"
 #include "services/shell/public/cpp/shell_client.h"
 
-namespace mojo {
 namespace shell {
 
 class ConnectTestSingletonApp : public ShellClient {
  public:
   ConnectTestSingletonApp() {}
   ~ConnectTestSingletonApp() override {}
 
  private:
-  // mojo::ShellClient:
+  // shell::ShellClient:
   void Initialize(Connector* connector, const Identity& identity,
                   uint32_t id) override {}
   bool AcceptConnection(Connection* connection) override {
     return true;
   }
 
   DISALLOW_COPY_AND_ASSIGN(ConnectTestSingletonApp);
 };
 
 }  // namespace shell
-}  // namespace mojo
 
 
 MojoResult MojoMain(MojoHandle shell_handle) {
-  return mojo::ApplicationRunner(
-      new mojo::shell::ConnectTestSingletonApp).Run(shell_handle);
+  return shell::ApplicationRunner(new shell::ConnectTestSingletonApp)
+      .Run(shell_handle);
 }