arc-bridge: Start ArcBridgeService on session start

chrome/browser/ui/ash/chrome_shell_delegate_chromeos.cc

Index: chrome/browser/ui/ash/chrome_shell_delegate_chromeos.cc
diff --git a/chrome/browser/ui/ash/chrome_shell_delegate_chromeos.cc b/chrome/browser/ui/ash/chrome_shell_delegate_chromeos.cc
index 79e85d1cb49ac7919688c08aa4aea7d698fac820..588348f3135d13f12e48833a61d28f67065b272e 100644
--- a/chrome/browser/ui/ash/chrome_shell_delegate_chromeos.cc
+++ b/chrome/browser/ui/ash/chrome_shell_delegate_chromeos.cc
@@ -35,6 +35,7 @@
 #include "chrome/browser/ui/browser_window.h"
 #include "chrome/grit/generated_resources.h"
 #include "chromeos/chromeos_switches.h"
+#include "components/arc/arc_bridge_service.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/user_metrics.h"
 #include "ui/aura/window.h"
@@ -225,11 +226,14 @@ void ChromeShellDelegate::PreInit() {
   display_configuration_observer_.reset(
       new chromeos::DisplayConfigurationObserver());
 
+  arc_session_observer_.reset(new ArcSessionObserver);
+
   chrome_user_metrics_recorder_.reset(new ChromeUserMetricsRecorder);
 }
 
 void ChromeShellDelegate::PreShutdown() {
   display_configuration_observer_.reset();
+  arc_session_observer_.reset();
   chrome_user_metrics_recorder_.reset();
 }
 
@@ -297,3 +301,32 @@ void ChromeShellDelegate::PlatformInit() {
                  chrome::NOTIFICATION_SESSION_STARTED,
                  content::NotificationService::AllSources());
 }
+
+ChromeShellDelegate::ArcSessionObserver::ArcSessionObserver() {
+  ash::Shell::GetInstance()->AddShellObserver(this);
+}
+
+ChromeShellDelegate::ArcSessionObserver::~ArcSessionObserver() {
+  ash::Shell::GetInstance()->RemoveShellObserver(this);
+}
+
+void ChromeShellDelegate::ArcSessionObserver::OnLoginStateChanged(
+    ash::user::LoginStatus status) {
+  switch (status) {
+    case ash::user::LOGGED_IN_LOCKED:
+    case ash::user::LOGGED_IN_KIOSK_APP:
+      return;
+
+    case ash::user::LOGGED_IN_NONE:
+      arc::ArcBridgeService::Get()->Shutdown();
+      break;
+
+    case ash::user::LOGGED_IN_USER:
+    case ash::user::LOGGED_IN_OWNER:
+    case ash::user::LOGGED_IN_GUEST:
+    case ash::user::LOGGED_IN_PUBLIC:
+    case ash::user::LOGGED_IN_SUPERVISED:
+      arc::ArcBridgeService::Get()->HandleStartup();
+      break;
+  }
+}