Remove LazyInterfacePtr.

mojo/public/cpp/application/lazy_interface_ptr.h

-// 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.
-
-#ifndef MOJO_PUBLIC_CPP_APPLICATION_LAZY_INTERFACE_PTR_H_
-#define MOJO_PUBLIC_CPP_APPLICATION_LAZY_INTERFACE_PTR_H_
-
-#include "mojo/public/cpp/application/connect.h"
-#include "mojo/public/interfaces/application/service_provider.mojom.h"
-
-namespace mojo {
-
-// An InterfacePtr that will request an implementation from a specified
-// ServiceProvider when it is first accessed with the get() method.
-template <typename Interface>
-class LazyInterfacePtr : public InterfacePtr<Interface> {
- public:
-  LazyInterfacePtr() : service_provider_(nullptr) {}
-
-  LazyInterfacePtr(ServiceProvider* service_provider)
-      : service_provider_(service_provider) {}
-
-  void set_service_provider(ServiceProvider* service_provider) {
-    if (service_provider != service_provider_) {
-      InterfacePtr<Interface>::reset();
-    }
-    service_provider_ = service_provider;
-  }
-
-  Interface* get() const {
-    if (!InterfacePtr<Interface>::get() && service_provider_) {
-      mojo::ConnectToService<Interface>(
-          service_provider_, const_cast<LazyInterfacePtr<Interface>*>(this));
-    }
-    return InterfacePtr<Interface>::get();
-  }
-  Interface* operator->() const { return get(); }
-  Interface& operator*() const { return *get(); }
-
- private:
-  ServiceProvider* service_provider_;
-};
-
-}  // namespace mojo
-
-#endif  // MOJO_PUBLIC_CPP_APPLICATION_LAZY_INTERFACE_PTR_H_