service worker: Implement NavigationPreloadManager.getState

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 0b858c9a37f0c8aeda5b32e24a3fc42fa5b3bb30..cf1887932bdada354677ebd92aaa9728c6663e89 100644
--- a/content/common/service_worker/service_worker_messages.h
+++ b/content/common/service_worker/service_worker_messages.h
@@ -195,6 +195,13 @@ IPC_MESSAGE_CONTROL5(ServiceWorkerHostMsg_EnableNavigationPreload,
                      int64_t /* registration_id */,
                      bool /* enable */)
 
+// Asks the browser to get navigation preload state for a registration.
+IPC_MESSAGE_CONTROL4(ServiceWorkerHostMsg_GetNavigationPreloadState,
+                     int /* thread_id */,
+                     int /* request_id */,
+                     int /* provider_id */,
+                     int64_t /* registration_id */)
+
 // Sends ExtendableMessageEvent to a service worker (renderer->browser).
 IPC_MESSAGE_CONTROL5(
     ServiceWorkerHostMsg_PostMessageToWorker,
@@ -491,6 +498,15 @@ IPC_MESSAGE_CONTROL4(ServiceWorkerMsg_EnableNavigationPreloadError,
                      int /* request_id */,
                      blink::WebServiceWorkerError::ErrorType /* code */,
                      std::string /* message */)
+IPC_MESSAGE_CONTROL3(ServiceWorkerMsg_DidGetNavigationPreloadState,
+                     int /* thread_id */,
+                     int /* request_id */,
+                     bool /* enabled */)
+IPC_MESSAGE_CONTROL4(ServiceWorkerMsg_GetNavigationPreloadStateError,
+                     int /* thread_id */,
+                     int /* request_id */,
+                     blink::WebServiceWorkerError::ErrorType /* code */,
+                     std::string /* message */)
 
 // Sends MessageEvent to a client document (browser->renderer).
 IPC_MESSAGE_CONTROL1(ServiceWorkerMsg_MessageToDocument,