arc: Revamp the ArcBridgeService interface

components/arc/crash_collector/arc_crash_collector_bridge.h

Index: components/arc/crash_collector/arc_crash_collector_bridge.h
diff --git a/components/arc/crash_collector/arc_crash_collector_bridge.h b/components/arc/crash_collector/arc_crash_collector_bridge.h
index 4446bd34773c6164a70ba38a1113e241bc394c67..7b73f9c93b8e16183d5bd68d6fdd4222e74d452f 100644
--- a/components/arc/crash_collector/arc_crash_collector_bridge.h
+++ b/components/arc/crash_collector/arc_crash_collector_bridge.h
@@ -15,15 +15,18 @@
 namespace arc {
 
 // Relays dumps for non-native ARC crashes to the crash reporter in Chrome OS.
-class ArcCrashCollectorBridge : public ArcService,
-                                public ArcBridgeService::Observer,
-                                public mojom::CrashCollectorHost {
+class ArcCrashCollectorBridge
+    : public ArcService,
+      public ArcBridgeService::InstanceObserver<mojom::CrashCollectorInstance>,
+      public mojom::CrashCollectorHost {
  public:
   explicit ArcCrashCollectorBridge(ArcBridgeService* bridge);
   ~ArcCrashCollectorBridge() override;
 
-  // ArcBridgeService::Observer overrides.
-  void OnCrashCollectorInstanceReady() override;
+  // ArcBridgeService::InstanceObserver<mojom::CrashCollectorInstance>
+  // overrides.
+  void OnInstanceReady(mojom::CrashCollectorInstance* crash_collector_instance,
+                       uint32_t version) override;
 
   // mojom::CrashCollectorHost overrides.
   void DumpCrash(const mojo::String& type, mojo::ScopedHandle pipe) override;