Replace ChildController with ShellClientFactory

mojo/shell/runner/host/child_process_host_unittest.cc

 // Copyright 2014 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.
 
 // Note: This file also tests child_process.*.
 
 #include "mojo/shell/runner/host/child_process_host.h"
 
 #include <utility>
 
@@ skipping 81 matching lines @@
 
   NativeRunnerDelegateImpl native_runner_delegate;
   ChildProcessHost child_process_host(blocking_pool.get(),
                                       &native_runner_delegate, false,
                                       Identity(), base::FilePath());
   base::RunLoop run_loop;
   child_process_host.Start(
       base::Bind(&ProcessReadyCallbackAdapater, run_loop.QuitClosure()));
   run_loop.Run();
 
-  child_process_host.ExitNow(123);
-  int exit_code = child_process_host.Join();
-  VLOG(2) << "Joined child: exit_code = " << exit_code;
-  EXPECT_EQ(123, exit_code);
+  child_process_host.Join();
   blocking_pool->Shutdown();
   edk::ShutdownIPCSupport();
   EXPECT_EQ(1u, native_runner_delegate.get_and_clear_adjust_count());
 }
 
 }  // namespace
 }  // namespace shell
 }  // namespace mojo