arc: Notify ARC instance failures via callbacks.

components/arc/arc_bridge_service_impl.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/arc/arc_bridge_service_impl.h"
 
 #include <string>
 #include <utility>
 
 #include "base/command_line.h"
@@ skipping 60 matching lines @@
 void ArcBridgeServiceImpl::PrerequisitesChanged() {
   DCHECK(CalledOnValidThread());
   VLOG(1) << "Prerequisites changed. "
           << "state=" << static_cast<uint32_t>(state())
           << ", available=" << available()
           << ", session_started=" << session_started_;
   if (state() == State::STOPPED) {
     if (!available() || !session_started_)
       return;
     VLOG(0) << "Prerequisites met, starting ARC";
+    SetStopReason(StopReason::SHUTDOWN);
     SetState(State::CONNECTING);
     bootstrap_->Start();
   } else {
     if (available() && session_started_)
       return;
     VLOG(0) << "Prerequisites stopped being met, stopping ARC";
     StopInstance();
   }
 }
 
@@ skipping 38 matching lines @@
 
   instance_ptr_->Init(binding_.CreateInterfacePtrAndBind());
 
   // The container can be considered to have been successfully launched, so
   // restart if the connection goes down without being requested.
   reconnect_ = true;
   VLOG(0) << "ARC ready";
   SetState(State::READY);
 }
 
-void ArcBridgeServiceImpl::OnStopped() {
+void ArcBridgeServiceImpl::OnStopped(StopReason stop_reason) {
   DCHECK(CalledOnValidThread());
+  SetStopReason(stop_reason);
   SetState(State::STOPPED);
   VLOG(0) << "ARC stopped";
   if (reconnect_) {
     // There was a previous invocation and it crashed for some reason. Try
     // starting the container again.
     reconnect_ = false;
     VLOG(0) << "ARC reconnecting";
     if (use_delay_before_reconnecting_) {
       // Instead of immediately trying to restart the container, give it some
       // time to finish tearing down in case it is still in the process of
@@ skipping 16 matching lines @@
     return;
   }
   VLOG(1) << "Mojo connection lost";
   instance_ptr_.reset();
   if (binding_.is_bound())
     binding_.Close();
   CloseAllChannels();
 }
 
 }  // namespace arc