Change mojo demo apps to use Application.

mojo/public/shell/service.h

Index: mojo/public/shell/service.h
diff --git a/mojo/public/shell/service.h b/mojo/public/shell/service.h
index 1a68353a165fa6c7a1de312da387f1ef220539e9..f8a62e6465228ab3a96fe80317845a763a1737e6 100644
--- a/mojo/public/shell/service.h
+++ b/mojo/public/shell/service.h
@@ -153,6 +153,7 @@ class Service : public ServiceInterface {
   }
 
   Context* context() const { return service_factory_->context(); }
+  Shell* GetShell() { return service_factory_->GetShell(); }

[darin (slow to review), 2014/02/13 00:05:39]

hmm, it'd be nice if GetShell() could just be shell(). Maybe they both can.

perhaps the RemotePtr<Shell> instance that lives on Application should just be a
member of ServiceFactoryBase::Owner. there's no real need for a virtual function
to access shell_.

   typename ServiceInterface::_Peer* client() { return client_.get(); }
 
  private: