ServiceWorker: some more groundwork in support of the update process

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 9715efc80440cc77c80fcd7dfa574e2083ec06da..c3b2411fe08d852637f226264d942322517ccb60 100644
--- a/content/common/service_worker/service_worker_messages.h
+++ b/content/common/service_worker/service_worker_messages.h
@@ -158,6 +158,13 @@ IPC_MESSAGE_CONTROL3(ServiceWorkerMsg_ServiceWorkerStateChanged,
                      int /* handle_id */,
                      blink::WebServiceWorkerState)
 
+// Tells the child process to set the installing ServiceWorker for the given
+// provider.
+IPC_MESSAGE_CONTROL3(ServiceWorkerMsg_SetInstallingServiceWorker,
+                     int /* thread_id */,
+                     int /* provider_id */,
+                     content::ServiceWorkerObjectInfo)
+
 // Tells the child process to set the waiting ServiceWorker for the given
 // provider.
 IPC_MESSAGE_CONTROL3(ServiceWorkerMsg_SetWaitingServiceWorker,