Adds a way to determine id of content handler that created app

components/resource_provider/public/cpp/resource_loader.cc

Index: components/resource_provider/public/cpp/resource_loader.cc
diff --git a/components/resource_provider/public/cpp/resource_loader.cc b/components/resource_provider/public/cpp/resource_loader.cc
index e26c9dc3721606bcb284bda304b2a5b7680e5008..3b6ea1681f8a5db3befc7e2d9ebe8bb3fcb9a8ec 100644
--- a/components/resource_provider/public/cpp/resource_loader.cc
+++ b/components/resource_provider/public/cpp/resource_loader.cc
@@ -29,10 +29,9 @@ ResourceLoader::ResourceLoader(mojo::Shell* shell,
   mojo::URLRequestPtr request(mojo::URLRequest::New());
   request->url = mojo::String::From("mojo:resource_provider");
   mojo::ServiceProviderPtr resource_provider_service_provider;
-  shell->ConnectToApplication(request.Pass(),
-                              GetProxy(&resource_provider_service_provider),
-                              nullptr,
-                              nullptr);
+  shell->ConnectToApplication(
+      request.Pass(), GetProxy(&resource_provider_service_provider), nullptr,
+      nullptr, mojo::Shell::ConnectToApplicationCallback());
   mojo::ConnectToService(resource_provider_service_provider.get(),
                          &resource_provider_);
   std::vector<std::string> paths_vector(paths.begin(), paths.end());