Eliminate mojo::Shell client lib class

mojo/shell/runner/child/native_apptest_target.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 <utility>
 
 #include "base/at_exit.h"
 #include "base/command_line.h"
 #include "base/macros.h"
 #include "mojo/public/cpp/bindings/binding_set.h"
 #include "mojo/shell/public/cpp/connection.h"
 #include "mojo/shell/public/cpp/interface_factory.h"
-#include "mojo/shell/public/cpp/shell.h"
 #include "mojo/shell/public/cpp/shell_client.h"
 #include "mojo/shell/runner/child/test_native_main.h"
 #include "mojo/shell/runner/child/test_native_service.mojom.h"
 #include "mojo/shell/runner/init.h"
 
 namespace {
 
 class TargetApplicationDelegate
     : public mojo::ShellClient,
       public mojo::shell::test::TestNativeService,
       public mojo::InterfaceFactory<mojo::shell::test::TestNativeService> {
  public:
   TargetApplicationDelegate() {}
   ~TargetApplicationDelegate() override {}
 
  private:
   // mojo::ShellClient:
-  void Initialize(mojo::Shell* shell, const std::string& url,
-                  uint32_t id, uint32_t user_id) override {}
   bool AcceptConnection(mojo::Connection* connection) override {
     connection->AddInterface<mojo::shell::test::TestNativeService>(this);
     return true;
   }
 
   // mojo::shell::test::TestNativeService:
   void Invert(bool from_driver, const InvertCallback& callback) override {
     callback.Run(!from_driver);
   }
 
@@ skipping 13 matching lines @@
 
 int main(int argc, char** argv) {
   base::AtExitManager at_exit;
   base::CommandLine::Init(argc, argv);
 
   mojo::shell::InitializeLogging();
 
   TargetApplicationDelegate delegate;
   return mojo::shell::TestNativeMain(&delegate);
 }