arc-bridge: Add the ARC Bridge Service

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..404d62e3aa15085681070d9f3dc9c1cb13207f4c 100644
--- a/chrome/browser/ui/ash/chrome_shell_delegate_chromeos.cc
+++ b/chrome/browser/ui/ash/chrome_shell_delegate_chromeos.cc
@@ -35,6 +35,8 @@
 #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 "components/arc/arc_prefs.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/user_metrics.h"
 #include "ui/aura/window.h"
@@ -225,11 +227,18 @@ 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();
+
+  // Remove the ARC observer now since it uses the ash::Shell instance in its
+  // destructor, which is unavailable after PreShutdown returns.
+  arc_session_observer_.reset();
+
   chrome_user_metrics_recorder_.reset();
 }
 
@@ -297,3 +306,37 @@ 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:
+      Profile* profile = ProfileManager::GetActiveUserProfile();
+      const bool enabled = arc::ArcPrefs::GetEnabled(
+          profile->GetPrefs(), base::CommandLine::ForCurrentProcess());
+      if (enabled) {
+        arc::ArcBridgeService::Get()->HandleStartup();
+      }
+      break;
+  }
+}