Reify view ownership as a message pipe.

mojo/ui/base_view.h

 // 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.
 
 #ifndef MOJO_UI_BASE_VIEW_H_
 #define MOJO_UI_BASE_VIEW_H_
 
 #include <string>
 
 #include "mojo/public/cpp/application/application_impl.h"
 #include "mojo/public/cpp/bindings/strong_binding.h"
 #include "mojo/public/cpp/system/macros.h"
 #include "mojo/public/interfaces/application/service_provider.mojom.h"
 #include "mojo/services/gfx/composition/interfaces/scenes.mojom.h"
 #include "mojo/services/ui/views/interfaces/view_manager.mojom.h"
-#include "mojo/services/ui/views/interfaces/view_provider.mojom.h"
 #include "mojo/services/ui/views/interfaces/views.mojom.h"
 
 namespace mojo {
 namespace ui {
 
 // Abstract base implementation of the View interface for simple applications.
 // Subclasses must handle layout and provide content for the scene by
 // implementing the methods of the |View| mojom interface.
 //
 // It is not necessary to use this class to implement all Views.
 // This class is merely intended to make the simple apps easier to write.
 class BaseView : public mojo::ui::View {
  public:
   // TODO(jeffbrown): Consider switching this over to an ApplicationConnector
   // but having ApplicationImpl is handy for simple examples.
-  BaseView(
-      mojo::ApplicationImpl* app_impl,
-      const std::string& label,
-      const mojo::ui::ViewProvider::CreateViewCallback& create_view_callback);
+  BaseView(mojo::ApplicationImpl* app_impl,
+           mojo::InterfaceRequest<mojo::ui::ViewOwner> view_owner_request,
+           const std::string& label);
 
   ~BaseView() override;
 
   // Gets the application implementation object provided at creation time.
   mojo::ApplicationImpl* app_impl() { return app_impl_; }
 
   // Gets the view manager.
   mojo::ui::ViewManager* view_manager() { return view_manager_.get(); }
 
   // Gets the view host for the view.
@@ skipping 25 matching lines @@
   mojo::ServiceProviderPtr view_service_provider_;
   mojo::gfx::composition::ScenePtr scene_;
 
   MOJO_DISALLOW_COPY_AND_ASSIGN(BaseView);
 };
 
 }  // namespace ui
 }  // namespace mojo
 
 #endif  // MOJO_UI_BASE_VIEW_H_