arc: Revamp the ArcBridgeService interface

chrome/browser/chromeos/arc/arc_policy_bridge.h

Index: chrome/browser/chromeos/arc/arc_policy_bridge.h
diff --git a/chrome/browser/chromeos/arc/arc_policy_bridge.h b/chrome/browser/chromeos/arc/arc_policy_bridge.h
index e9e655883aefbdfd05f8bfeb7f44ecf573b85b73..61a5778d97ba698b0941bdbd824fc56cf2eb9ae3 100644
--- a/chrome/browser/chromeos/arc/arc_policy_bridge.h
+++ b/chrome/browser/chromeos/arc/arc_policy_bridge.h
@@ -26,10 +26,11 @@ enum ArcCertsSyncMode : int32_t {
   COPY_CA_CERTS = 1
 };
 
-class ArcPolicyBridge : public ArcService,
-                        public ArcBridgeService::Observer,
-                        public mojom::PolicyHost,
-                        public policy::PolicyService::Observer {
+class ArcPolicyBridge
+    : public ArcService,
+      public ArcBridgeService::InstanceObserver<mojom::PolicyInstance>,
+      public mojom::PolicyHost,
+      public policy::PolicyService::Observer {
  public:
   explicit ArcPolicyBridge(ArcBridgeService* bridge_service);
   ArcPolicyBridge(ArcBridgeService* bridge_service,
@@ -38,9 +39,10 @@ class ArcPolicyBridge : public ArcService,
 
   void OverrideIsManagedForTesting(bool is_managed);
 
-  // ArcBridgeService::Observer overrides.
-  void OnPolicyInstanceReady() override;
-  void OnPolicyInstanceClosed() override;
+  // ArcBridgeService::InstanceObserver<mojom::PolicyInstance> overrides.
+  void OnInstanceReady(mojom::PolicyInstance* policy_instance,
+                       uint32_t version) override;
+  void OnInstanceClosed(mojom::PolicyInstance*) override;
 
   // PolicyHost overrides.
   void GetPolicies(const GetPoliciesCallback& callback) override;