Remove last uses of InterfaceImpl<> in Sky C++ code

sky/tools/tester/tester.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.
 
 #include <iostream>
 #include "base/bind.h"
 #include "base/memory/weak_ptr.h"
 #include "mojo/application/application_runner_chromium.h"
 #include "mojo/public/c/system/main.h"
 #include "mojo/public/cpp/application/application_delegate.h"
@@ skipping 60 matching lines @@
   virtual void Initialize(mojo::ApplicationImpl* impl) override {
     window_manager_app_->Initialize(impl);
 
     if (impl->args().size() >= 2)
       url_from_args_ = impl->args()[1];
   }
   virtual bool ConfigureIncomingConnection(
       mojo::ApplicationConnection* connection) override {
     window_manager_app_->ConfigureIncomingConnection(connection);
     if (test_runner_)
-      connection->AddService(test_runner_->test_harness_factory());
+      connection->AddService(test_runner_.get());
     return true;
   }
 
   // Overridden from mojo::ViewManagerDelegate:
   virtual void OnEmbed(mojo::View* root,
                        mojo::InterfaceRequest<mojo::ServiceProvider> services,
                        mojo::ServiceProviderPtr exposed_services) override {
     root_ = root;
     root_->AddObserver(this);
 
@@ skipping 71 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(SkyTester);
 };
 
 }  // namespace tester
 }  // namespace examples
 
 MojoResult MojoMain(MojoHandle shell_handle) {
   mojo::ApplicationRunnerChromium runner(new sky::tester::SkyTester);
   return runner.Run(shell_handle);
 }