[fuchsia] Get ApplicationConfigManager from component service directory.

ApplicationConfigManager is now available as a normal service, so
there is no need to reach it via ConnectToAgentService().

However, it must be reached via each component's service-directory,
rather than the CastRunner process' service-directory, since the Cast
components run in a different "session" from the Runner.

Bug: fuchsia:43004
Change-Id: I638cc3bca4d3d80f7f97a50d637065eb36f9d89a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2089699
Commit-Queue: Sergey Ulanov <sergeyu@chromium.org>
Reviewed-by: Sergey Ulanov <sergeyu@chromium.org>
Auto-Submit: Wez <wez@chromium.org>
Cr-Commit-Position: refs/heads/master@{#755245}

fuchsia/runners/cast/cast_runner.cc

@@ -158,8 +158,8 @@ void CastRunner::StartComponent(
   // Request the configuration for this application from the app_config_manager.
   // This will return the configuration for the application, as well as the
   // agent that should handle this application.
-  pending_component->agent_manager->ConnectToAgentService(
-      kAgentComponentUrl, pending_component->app_config_manager.NewRequest());
+  pending_component->startup_context->svc()->Connect(
+      pending_component->app_config_manager.NewRequest());
   pending_component->app_config_manager.set_error_handler(
       [this, pending_component = pending_component.get()](zx_status_t status) {
         ZX_LOG(ERROR, status) << "ApplicationConfigManager disconnected.";

fuchsia/runners/cast/cast_runner_integration_test.cc

@@ -216,7 +216,9 @@ class CastRunnerIntegrationTest : public testing::Test {
 
  protected:
   explicit CastRunnerIntegrationTest(
-      fuchsia::web::ContextFeatureFlags feature_flags) {
+      fuchsia::web::ContextFeatureFlags feature_flags)
+      : app_config_manager_binding_(&component_services_,
+                                    &app_config_manager_) {
     EnsureFuchsiaDirSchemeInitialized();
 
     // Create the CastRunner, published into |outgoing_directory_|.
@@ -367,6 +369,8 @@ class CastRunnerIntegrationTest : public testing::Test {
 
   // Incoming service directory, ComponentContext and per-component state.
   sys::OutgoingDirectory component_services_;
+  base::fuchsia::ScopedServiceBinding<chromium::cast::ApplicationConfigManager>
+      app_config_manager_binding_;
   std::unique_ptr<cr_fuchsia::FakeComponentContext> component_context_;
   fuchsia::sys::ComponentControllerPtr component_controller_;
   std::unique_ptr<sys::ServiceDirectory> component_services_client_;