[Mojo Video Capture] Stop service when last client disconnects.

services/video_capture/test/service_test.cc

Index: services/video_capture/test/service_test.cc
diff --git a/services/video_capture/test/service_test.cc b/services/video_capture/test/service_test.cc
index 60f18ce6b155755cfc1a9d7703d384f96ce1c188..eb889a834e442b354f1045945e4e601519c2a377 100644
--- a/services/video_capture/test/service_test.cc
+++ b/services/video_capture/test/service_test.cc
@@ -4,8 +4,19 @@
 
 #include "services/video_capture/test/service_test.h"
 
+#include "services/service_manager/public/interfaces/constants.mojom.h"
+#include "services/service_manager/public/interfaces/service_manager.mojom.h"
+#include "services/video_capture/public/interfaces/constants.mojom.h"
+
 namespace video_capture {
 
+ServiceManagerListenerImpl::ServiceManagerListenerImpl(
+    service_manager::mojom::ServiceManagerListenerRequest request,
+    base::RunLoop* loop)
+    : binding_(this, std::move(request)), loop_(loop) {}
+
+ServiceManagerListenerImpl::~ServiceManagerListenerImpl() = default;
+
 ServiceTest::ServiceTest()
     : service_manager::test::ServiceTest("video_capture_unittests") {}
 
@@ -13,7 +24,19 @@ ServiceTest::~ServiceTest() = default;
 
 void ServiceTest::SetUp() {
   service_manager::test::ServiceTest::SetUp();
-  connector()->BindInterface("video_capture", &service_);
+
+  service_manager::mojom::ServiceManagerPtr service_manager;
+  connector()->BindInterface(service_manager::mojom::kServiceName,
+                             &service_manager);
+  service_manager::mojom::ServiceManagerListenerPtr listener;
+  base::RunLoop loop;
+  service_state_observer_ = base::MakeUnique<ServiceManagerListenerImpl>(
+      mojo::MakeRequest(&listener), &loop);
+  service_manager->AddListener(std::move(listener));
+  loop.Run();
+
+  connector()->BindInterface(mojom::kServiceName, &service_);
+  service_->SetShutdownDelayInSeconds(0.0f);
   service_->ConnectToFakeDeviceFactory(mojo::MakeRequest(&factory_));
 }