Identify service worker version at main resource load time.

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 c4af2717f2e3c8a3c08641a5fb6953717727df70..ea74be9985522ca9c38213abaef271d2de97a9fb 100644
--- a/content/common/service_worker/service_worker_messages.h
+++ b/content/common/service_worker/service_worker_messages.h
@@ -55,6 +55,43 @@ IPC_MESSAGE_CONTROL3(ServiceWorkerHostMsg_PostMessage,
                      base::string16 /* message */,
                      std::vector<int> /* sent_message_port_ids */)
 
+// Informs the browser of a new ServiceWorkerProvider in the child process,
+// |provider_id| is unique within its child process.
+IPC_MESSAGE_CONTROL1(ServiceWorkerHostMsg_ProviderCreated,
+                     int /* provider_id */)
+
+// Informs the browser of a ServiceWorkerProvider being destroyed.
+IPC_MESSAGE_CONTROL1(ServiceWorkerHostMsg_ProviderDestroyed,
+                     int /* provider_id */)
+
+// Informs the browser that |provider_id| is associated
+// with a service worker script running context and
+// |version_id| identifies which ServcieWorkerVersion.
+IPC_MESSAGE_CONTROL2(ServiceWorkerHostMsg_SetVersionId,
+                     int /* provider_id */,
+                     int64 /* version_id */)
+
+// Informs the browser of a new scriptable API client in the child process.
+IPC_MESSAGE_CONTROL2(ServiceWorkerHostMsg_AddScriptClient,
+                     int /* thread_id */,
+                     int /* provider_id */)
+
+// Informs the browser that the scriptable API client is unregistered.
+IPC_MESSAGE_CONTROL2(ServiceWorkerHostMsg_RemoveScriptClient,
+                     int /* thread_id */,
+                     int /* provider_id */)
+
+// Informs the browser that install event handling has finished.
+// Sent via EmbeddedWorker. If there was an exception during the
+// event handling it'll be reported back separately (to be propagated
+// to the documents).
+IPC_MESSAGE_CONTROL0(ServiceWorkerHostMsg_InstallEventFinished)
+
+// Informs the browser that fetch event handling has finished.
+IPC_MESSAGE_CONTROL2(ServiceWorkerHostMsg_FetchEventFinished,
+                     content::ServiceWorkerFetchEventResult,
+                     content::ServiceWorkerResponse)
+
 // Messages sent from the browser to the child process.
 
 // Response to ServiceWorkerMsg_RegisterServiceWorker
@@ -90,32 +127,3 @@ IPC_MESSAGE_CONTROL3(ServiceWorkerMsg_Message,
                      std::vector<int> /* sent_message_port_ids */,
                      std::vector<int> /* new_routing_ids */)
 
-// Informs the browser of a new ServiceWorkerProvider in the child process,
-// |provider_id| is unique within its child process.
-IPC_MESSAGE_CONTROL1(ServiceWorkerHostMsg_ProviderCreated,
-                     int /* provider_id */)
-
-// Informs the browser of a ServiceWorkerProvider being destroyed.
-IPC_MESSAGE_CONTROL1(ServiceWorkerHostMsg_ProviderDestroyed,
-                     int /* provider_id */)
-
-// Informs the browser of a new scriptable API client in the child process.
-IPC_MESSAGE_CONTROL2(ServiceWorkerHostMsg_AddScriptClient,
-                     int /* thread_id */,
-                     int /* provider_id */)
-
-// Informs the browser that the scriptable API client is unregistered.
-IPC_MESSAGE_CONTROL2(ServiceWorkerHostMsg_RemoveScriptClient,
-                     int /* thread_id */,
-                     int /* provider_id */)
-
-// Informs the browser that install event handling has finished.
-// Sent via EmbeddedWorker. If there was an exception during the
-// event handling it'll be reported back separately (to be propagated
-// to the documents).
-IPC_MESSAGE_CONTROL0(ServiceWorkerHostMsg_InstallEventFinished)
-
-// Informs the browser that fetch event handling has finished.
-IPC_MESSAGE_CONTROL2(ServiceWorkerHostMsg_FetchEventFinished,
-                     content::ServiceWorkerFetchEventResult,
-                     content::ServiceWorkerResponse)