ServiceWorker: Make a way to retrieve a service worker version id (Chromium)

content/renderer/render_frame_impl.cc

Index: content/renderer/render_frame_impl.cc
diff --git a/content/renderer/render_frame_impl.cc b/content/renderer/render_frame_impl.cc
index 0ca01ad816c2115d2f4f59d147d63c04bac880dc..26e9ad6910e0049c228220e0a1eede4f66fd7a91 100644
--- a/content/renderer/render_frame_impl.cc
+++ b/content/renderer/render_frame_impl.cc
@@ -23,6 +23,7 @@
 #include "content/child/plugin_messages.h"
 #include "content/child/quota_dispatcher.h"
 #include "content/child/request_extra_data.h"
+#include "content/child/service_worker/service_worker_handle_reference.h"
 #include "content/child/service_worker/service_worker_network_provider.h"
 #include "content/child/service_worker/service_worker_provider_context.h"
 #include "content/child/service_worker/web_service_worker_provider_impl.h"
@@ -3268,6 +3269,16 @@ bool RenderFrameImpl::isControlledByServiceWorker(WebDataSource& data_source) {
       kInvalidServiceWorkerHandleId;
 }
 
+int64_t RenderFrameImpl::serviceWorkerID(WebDataSource& data_source) {
+  ServiceWorkerNetworkProvider* provider =
+      ServiceWorkerNetworkProvider::FromDocumentState(
+          DocumentState::FromDataSource(&data_source));
+
+  if (provider->context()->controller())
+    return provider->context()->controller()->version_id();
+  return kInvalidServiceWorkerVersionId;
+}
+
 void RenderFrameImpl::postAccessibilityEvent(const blink::WebAXObject& obj,
                                              blink::WebAXEvent event) {
   HandleWebAccessibilityEvent(obj, event);