arc: Revamp the ArcBridgeService interface

chrome/browser/chromeos/arc/arc_auth_service.h

Index: chrome/browser/chromeos/arc/arc_auth_service.h
diff --git a/chrome/browser/chromeos/arc/arc_auth_service.h b/chrome/browser/chromeos/arc/arc_auth_service.h
index c826427d37f2dfcaa63cec44649612867b937e31..957dd6f5f32fe53ad557fc818a57587c52a98657 100644
--- a/chrome/browser/chromeos/arc/arc_auth_service.h
+++ b/chrome/browser/chromeos/arc/arc_auth_service.h
@@ -40,13 +40,15 @@ class ArcAuthContext;
 
 // This class proxies the request from the client to fetch an auth code from
 // LSO.
-class ArcAuthService : public ArcService,
-                       public mojom::AuthHost,
-                       public ArcBridgeService::Observer,
-                       public ArcAndroidManagementCheckerDelegate,
-                       public ArcAuthContextDelegate,
-                       public syncable_prefs::PrefServiceSyncableObserver,
-                       public syncable_prefs::SyncedPrefObserver {
+class ArcAuthService
+    : public ArcService,
+      public mojom::AuthHost,
+      public ArcBridgeService::Observer,
+      public ArcBridgeService::InstanceObserver<mojom::AuthInstance>,
+      public ArcAndroidManagementCheckerDelegate,
+      public ArcAuthContextDelegate,
+      public syncable_prefs::PrefServiceSyncableObserver,
+      public syncable_prefs::SyncedPrefObserver {
  public:
   enum class State {
     NOT_INITIALIZED,  // Service is not initialized.
@@ -121,9 +123,12 @@ class ArcAuthService : public ArcService,
   void RemoveObserver(Observer* observer);
 
   // ArcBridgeService::Observer:
-  void OnAuthInstanceReady() override;
   void OnBridgeStopped() override;
 
+  // ArcBridgeService::InstanceObserver<mojom::AuthInstance>:
+  void OnInstanceReady(mojom::AuthInstance* auth_instance,
+                       uint32_t version) override;
+
   // AuthHost:
   // For security reason this code can be used only once and exists for specific
   // period of time.