service worker: navigation preload basic setters/getters and flag

content/common/service_worker/service_worker_messages.h

Index: content/common/service_worker/service_worker_messages.h
diff --git a/content/common/service_worker/service_worker_messages.h b/content/common/service_worker/service_worker_messages.h
index 59af129dd12f5df863d18ace425eed15484abba0..611cc580abad71c10d148a96c7e03766293c0bc9 100644
--- a/content/common/service_worker/service_worker_messages.h
+++ b/content/common/service_worker/service_worker_messages.h
@@ -187,6 +187,17 @@ IPC_MESSAGE_CONTROL3(ServiceWorkerHostMsg_GetRegistrationForReady,
                      int /* request_id */,
                      int /* provider_id */)
 
+IPC_MESSAGE_CONTROL4(ServiceWorkerHostMsg_SetNavigationPreload,
+                     int /* thread_id */,
+                     int /* request_id */,
+                     int /* handle_id */,
+                     std::string /* value */)
+
+IPC_MESSAGE_CONTROL3(ServiceWorkerHostMsg_GetNavigationPreload,
+                     int /* thread_id */,
+                     int /* request_id */,
+                     int /* handle_id */)
+
 // Sends ExtendableMessageEvent to a service worker (renderer->browser).
 IPC_MESSAGE_CONTROL5(
     ServiceWorkerHostMsg_PostMessageToWorker,
@@ -412,6 +423,18 @@ IPC_MESSAGE_CONTROL4(ServiceWorkerMsg_DidGetRegistrationForReady,
                      content::ServiceWorkerRegistrationObjectInfo,
                      content::ServiceWorkerVersionAttributes)
 
+// Response to ServiceWorkerHostMsg_SetNavigationPreload.
+IPC_MESSAGE_CONTROL2(ServiceWorkerMsg_DidSetNavigationPreload,
+                     int /* thread_id */,
+                     int /* request_id */)
+
+// Response to ServiceWorkerHostMsg_GetNavigationPreload.
+IPC_MESSAGE_CONTROL4(ServiceWorkerMsg_DidGetNavigationPreload,
+                     int /* thread_id */,
+                     int /* request_id */,
+                     bool /* enabled */,
+                     std::string /* value */)
+
 // Sent when any kind of registration error occurs during a
 // RegisterServiceWorker handler above.
 IPC_MESSAGE_CONTROL4(ServiceWorkerMsg_ServiceWorkerRegistrationError,