| 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 6fec69cdaf9a6d60c19eade88a7b09d1fd2e7846..6e8c3fe73760ac141d991e723cc8355cb9bfbe35 100644 | 
| --- a/content/common/service_worker/service_worker_messages.h | 
| +++ b/content/common/service_worker/service_worker_messages.h | 
| @@ -244,12 +244,14 @@ IPC_MESSAGE_CONTROL1(ServiceWorkerHostMsg_DecrementRegistrationRefCount, | 
| IPC_MESSAGE_CONTROL1(ServiceWorkerHostMsg_TerminateWorker, | 
| int /* handle_id */) | 
|  | 
| -// Informs the browser that |provider_id| is associated | 
| -// with a service worker script running context and | 
| -// |version_id| identifies which ServiceWorkerVersion. | 
| -IPC_MESSAGE_CONTROL2(ServiceWorkerHostMsg_SetVersionId, | 
| +// Informs the browser that a service worker is starting up in a provider. | 
| +// |provider_id| identifies the ServiceWorkerProviderHost hosting the service | 
| +// worker. |version_id| identifies the ServiceWorkerVersion and | 
| +// |embedded_worker_id| identifies the EmbeddedWorkerInstance. | 
| +IPC_MESSAGE_CONTROL3(ServiceWorkerHostMsg_SetVersionId, | 
| int /* provider_id */, | 
| -                     int64_t /* version_id */) | 
| +                     int64_t /* version_id */, | 
| +                     int /* embedded_worker_id */) | 
|  | 
| // Informs the browser that event handling has finished. | 
| // Routed to the target ServiceWorkerVersion. | 
|  |