Mojo: abstract interface implementation from generated Stub classes

mojo/examples/hello_world_service/hello_world_service_impl.cc

 // Copyright 2013 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 "mojo/examples/hello_world_service/hello_world_service_impl.h"
 
 #include <string>
 
 #include "base/logging.h"
 
 namespace mojo {
 namespace examples {
 
 HelloWorldServiceImpl::HelloWorldServiceImpl(ScopedMessagePipeHandle pipe)
-    : client_(pipe.Pass()) {
-  client_.SetPeer(this);
+    : client_(pipe.Pass(), this) {
 }
 
 void HelloWorldServiceImpl::Greeting(const String& greeting) {
   LOG(INFO) << greeting.To<std::string>();
   client_->DidReceiveGreeting(42);
 }
 
 HelloWorldServiceImpl::~HelloWorldServiceImpl() {}
 
 }  // namespace examples
 }  // namespace mojo