service worker: Implement NavigationPreloadManager.setHeaderValue

content/browser/service_worker/service_worker_dispatcher_host.h

Index: content/browser/service_worker/service_worker_dispatcher_host.h
diff --git a/content/browser/service_worker/service_worker_dispatcher_host.h b/content/browser/service_worker/service_worker_dispatcher_host.h
index 3408e04b731d66800033fd51d1487c57f27d56c8..477c6a4a5ad11344f20ab2aae173331a1ac2814c 100644
--- a/content/browser/service_worker/service_worker_dispatcher_host.h
+++ b/content/browser/service_worker/service_worker_dispatcher_host.h
@@ -143,6 +143,11 @@ class CONTENT_EXPORT ServiceWorkerDispatcherHost
                                    int request_id,
                                    int provider_id,
                                    int64_t registration_id);
+  void OnSetNavigationPreloadHeader(int thread_id,
+                                    int request_id,
+                                    int provider_id,
+                                    int64_t registration_id,
+                                    const std::string& value);
   void OnProviderDestroyed(int provider_id);
   void OnSetHostedVersionId(int provider_id,
                             int64_t version_id,