arc: Revamp the ArcBridgeService interface

components/arc/clipboard/arc_clipboard_bridge.h

Index: components/arc/clipboard/arc_clipboard_bridge.h
diff --git a/components/arc/clipboard/arc_clipboard_bridge.h b/components/arc/clipboard/arc_clipboard_bridge.h
index 1980b691c0660b356060ab93d7ffa17456eb3587..70b4dc1773ece83e4e5df6cb8c789af18b4c5319 100644
--- a/components/arc/clipboard/arc_clipboard_bridge.h
+++ b/components/arc/clipboard/arc_clipboard_bridge.h
@@ -14,15 +14,17 @@
 
 namespace arc {
 
-class ArcClipboardBridge : public ArcService,
-                           public ArcBridgeService::Observer,
-                           public mojom::ClipboardHost {
+class ArcClipboardBridge
+    : public ArcService,
+      public ArcBridgeService::InstanceObserver<mojom::ClipboardInstance>,
+      public mojom::ClipboardHost {
  public:
   explicit ArcClipboardBridge(ArcBridgeService* bridge_service);
   ~ArcClipboardBridge() override;
 
-  // ArcBridgeService::Observer overrides.
-  void OnClipboardInstanceReady() override;
+  // ArcBridgeService::InstanceObserver<mojom::ClipboardInstance> overrides.
+  void OnInstanceReady(mojom::ClipboardInstance* clipboard_instance,
+                       uint32_t version) override;
 
   // mojom::ClipboardHost overrides.
   void SetTextContent(const mojo::String& text) override;