arc: Notify ARC instance failures via callbacks.

components/arc/test/fake_arc_bridge_bootstrap.cc

Index: components/arc/test/fake_arc_bridge_bootstrap.cc
diff --git a/components/arc/test/fake_arc_bridge_bootstrap.cc b/components/arc/test/fake_arc_bridge_bootstrap.cc
index cd05697100f6719767cca27677a7695af94e2821..8230cdbf80ab26c8eca430da01d9a9a898254aba 100644
--- a/components/arc/test/fake_arc_bridge_bootstrap.cc
+++ b/components/arc/test/fake_arc_bridge_bootstrap.cc
@@ -28,11 +28,13 @@ void FakeArcBridgeBootstrap::Start() {
 void FakeArcBridgeBootstrap::Stop() {
   DCHECK(delegate_);
   instance_->Unbind();
-  delegate_->OnStopped();
+  delegate_->OnStopped(StopReason::SHUTDOWN);
 }
 
-void FakeArcBridgeBootstrap::OnCrashed() {
-  Stop();
+void FakeArcBridgeBootstrap::OnStopped(StopReason reason) {
+  DCHECK(delegate_);
+  instance_->Unbind();
+  delegate_->OnStopped(reason);
 }
 
 }  // namespace arc