Add a Display and ContextProvider concept to mojom, use to recreate

services/fake_surfaces/fake_surfaces_service_application.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 FAKE_SERVICES_SURFACES_SURFACES_SERVICE_APPLICATION_H_
 #define FAKE_SERVICES_SURFACES_SURFACES_SERVICE_APPLICATION_H_
 
 #include "base/macros.h"
 #include "mojo/common/tracing_impl.h"
 #include "mojo/public/cpp/application/application_delegate.h"
 #include "mojo/public/cpp/application/interface_factory.h"
+#include "mojo/services/surfaces/public/interfaces/display.mojom.h"
 #include "mojo/services/surfaces/public/interfaces/surfaces.mojom.h"
 
 namespace mojo {
 class ApplicationConnection;
 }
 
 namespace fake_surfaces {
 
 class FakeSurfacesServiceApplication
     : public mojo::ApplicationDelegate,
+      public mojo::InterfaceFactory<mojo::DisplayFactory>,
       public mojo::InterfaceFactory<mojo::Surface> {
  public:
   FakeSurfacesServiceApplication();
   ~FakeSurfacesServiceApplication() override;
 
   // ApplicationDelegate implementation.
   void Initialize(mojo::ApplicationImpl* app) override;
   bool ConfigureIncomingConnection(
       mojo::ApplicationConnection* connection) override;
 
+  // InterfaceFactory<mojo::DisplayFactory> implementation.
+  void Create(mojo::ApplicationConnection* connection,
+              mojo::InterfaceRequest<mojo::DisplayFactory> request) override;
+
   // InterfaceFactory<mojo::Surface> implementation.
   void Create(mojo::ApplicationConnection* connection,
               mojo::InterfaceRequest<mojo::Surface> request) override;
 
  private:
   uint32_t next_id_namespace_;
   mojo::TracingImpl tracing_;
 
   DISALLOW_COPY_AND_ASSIGN(FakeSurfacesServiceApplication);
 };
 
 }  // namespace fake_surfaces
 
 #endif  // FAKE_SERVICES_SURFACES_SURFACES_SERVICE_APPLICATION_H_