Start of foreign fetch implementation.

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 8164130334d5801bd363e42aa60a47ed07a0bfcd..104dc32214921dab9d687a0d33cda57a7d11163e 100644
--- a/content/common/service_worker/service_worker_messages.h
+++ b/content/common/service_worker/service_worker_messages.h
@@ -290,6 +290,11 @@ IPC_MESSAGE_ROUTED1(ServiceWorkerHostMsg_SkipWaiting,
 IPC_MESSAGE_ROUTED1(ServiceWorkerHostMsg_ClaimClients,
                     int /* request_id */)
 
+// Informs the browser of new foreign fetch subscopes this worker wants to
+// handle. Should only be sent while an install event is being handled.
+IPC_MESSAGE_ROUTED1(ServiceWorkerHostMsg_RegisterForeignFetchScopes,
+                    std::vector<GURL> /* sub_scopes */)
+
 //---------------------------------------------------------------------------
 // Messages sent from the browser to the child process.
 //