arc: Notify ARC instance failures via callbacks.

components/arc/test/fake_arc_bridge_instance.cc

Index: components/arc/test/fake_arc_bridge_instance.cc
diff --git a/components/arc/test/fake_arc_bridge_instance.cc b/components/arc/test/fake_arc_bridge_instance.cc
index e51e54a2210dafbe991e261303421f651dfea97b..d65734493ff361ada021987549e1bf148ccfb2de 100644
--- a/components/arc/test/fake_arc_bridge_instance.cc
+++ b/components/arc/test/fake_arc_bridge_instance.cc
@@ -31,10 +31,10 @@ void FakeArcBridgeInstance::WaitForInitCall() {
   binding_.WaitForIncomingMethodCall();
 }
 
-void FakeArcBridgeInstance::SimulateCrash() {
+void FakeArcBridgeInstance::Stop(ArcBridgeService::StopReason reason) {
   if (!delegate_)
     return;
-  delegate_->OnCrashed();
+  delegate_->OnStopped(reason);
 }
 
 }  // namespace arc