Implement EmbeddedWorkerContextClient.setCachedMetadata/clearCachedMetadata

content/browser/service_worker/service_worker_version.h

Index: content/browser/service_worker/service_worker_version.h
diff --git a/content/browser/service_worker/service_worker_version.h b/content/browser/service_worker/service_worker_version.h
index 609806107fc3b5ebbba57a601bb3917dbcbe8cc5..f95b4ea26f68ec51e8d80560dc92cc70ca1e15de 100644
--- a/content/browser/service_worker/service_worker_version.h
+++ b/content/browser/service_worker/service_worker_version.h
@@ -371,6 +371,9 @@ class CONTENT_EXPORT ServiceWorkerVersion
                             int client_id,
                             const ServiceWorkerClientInfo& client_info);
 
+  void OnSetCachedMetadata(const GURL& url, const std::vector<char>& data);
+  void OnClearCachedMetadata(const GURL& url);
+
   void OnPostMessageToDocument(int client_id,
                                const base::string16& message,
                                const std::vector<int>& sent_message_port_ids);