Port sky_shell to Linux for testing

sky/shell/ui/internals.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 SKY_SHELL_UI_INTERNALS_H_
 #define SKY_SHELL_UI_INTERNALS_H_
 
 #include "base/supports_user_data.h"
 #include "dart/runtime/include/dart_api.h"
 #include "mojo/public/cpp/application/interface_factory.h"
 #include "mojo/public/cpp/application/service_provider_impl.h"
 #include "mojo/public/interfaces/application/service_provider.mojom.h"
 #include "mojo/services/asset_bundle/public/interfaces/asset_bundle.mojom.h"
 
 namespace mojo {
 class ApplicationConnection;
 }
 
 namespace sky {
 namespace shell {
 
 class Internals
   : public base::SupportsUserData::Data,
     public mojo::InterfaceFactory<mojo::asset_bundle::AssetUnpacker> {
  public:
-  virtual ~Internals();
+  ~Internals() override;
 
   static void Create(Dart_Isolate isolate,
                      mojo::ServiceProviderPtr platform_service_provider);
 
   mojo::Handle TakeServicesProvidedByEmbedder();
 
  private:
   explicit Internals(mojo::ServiceProviderPtr platform_service_provider);
 
   // |mojo::InterfaceFactory<mojo::asset_bundle::AssetUnpacker>| implementation:
   void Create(
       mojo::ApplicationConnection* connection,
       mojo::InterfaceRequest<mojo::asset_bundle::AssetUnpacker>) override;
 
   mojo::ServiceProviderPtr service_provider_;
   mojo::ServiceProviderImpl service_provider_impl_;
   mojo::ServiceProviderPtr platform_service_provider_;
 
   MOJO_DISALLOW_COPY_AND_ASSIGN(Internals);
 };
 
 }  // namespace shell
 }  // namespace sky
 
 #endif  // SKY_SHELL_UI_INTERNALS_H_