Add some simple HTMLViewer apptests.

mojo/services/html_viewer/html_document.cc

Index: mojo/services/html_viewer/html_document.cc
diff --git a/mojo/services/html_viewer/html_document.cc b/mojo/services/html_viewer/html_document.cc
index 2d56d142c7f88ff40e012a6ea89938d1fb59a92d..d1c570821f3fa1d0827d7c329f6723f7e25cd043 100644
--- a/mojo/services/html_viewer/html_document.cc
+++ b/mojo/services/html_viewer/html_document.cc
@@ -99,7 +99,7 @@ bool CanNavigateLocally(blink::WebFrame* frame,
 }  // namespace
 
 HTMLDocument::HTMLDocument(
-    mojo::InterfaceRequest<mojo::ServiceProvider> services,
+    mojo::ServiceProviderImpl* service_provider,
     URLResponsePtr response,
     mojo::Shell* shell,
     scoped_refptr<base::MessageLoopProxy> compositor_thread,
@@ -113,9 +113,9 @@ HTMLDocument::HTMLDocument(
       compositor_thread_(compositor_thread),
       web_media_player_factory_(web_media_player_factory),
       is_headless_(is_headless) {
-  exported_services_.AddService(this);
-  exported_services_.AddService(&view_manager_client_factory_);
-  exported_services_.Bind(services.Pass());
+  printf("MSW HTMLDocument::HTMLDocument\n");
+  service_provider->AddService(this);
+  service_provider->AddService(&view_manager_client_factory_);
   Load(response_.Pass());
 }
 
@@ -143,6 +143,7 @@ void HTMLDocument::OnEmbed(
 
 void HTMLDocument::Create(mojo::ApplicationConnection* connection,
                           mojo::InterfaceRequest<AxProvider> request) {
+  printf("MSW HTMLDocument::Create (AxProvider) web_view=%p\n", web_view_);
   if (!web_view_)
     return;
   ax_provider_impls_.insert(