Transfer serviceworker state during cross site navigations too.

content/browser/service_worker/service_worker_request_handler.cc

Index: content/browser/service_worker/service_worker_request_handler.cc
diff --git a/content/browser/service_worker/service_worker_request_handler.cc b/content/browser/service_worker/service_worker_request_handler.cc
index 6c871e6cd55ba588518b0f856964d472c927fb2a..d755ff94aeafe88317fc2a5a770de4c6d9e40d68 100644
--- a/content/browser/service_worker/service_worker_request_handler.cc
+++ b/content/browser/service_worker/service_worker_request_handler.cc
@@ -129,6 +129,28 @@ bool ServiceWorkerRequestHandler::IsControlledByServiceWorker(
          handler->provider_host_->running_hosted_version();
 }
 
+void ServiceWorkerRequestHandler::PrepareForCrossSiteTransfer(
+    int old_process_id) {
+  if (!provider_host_ || !context_)
+    return;
+  host_for_cross_site_transfer_ =
+      context_->TransferProviderHostOut(old_process_id,
+                                        provider_host_->provider_id());
+  DCHECK_EQ(provider_host_.get(), host_for_cross_site_transfer_.get());
+}
+
+void ServiceWorkerRequestHandler::CompleteCrossSiteTransfer(
+    int new_process_id, int new_host_id) {
+  if (!host_for_cross_site_transfer_.get() || !context_)
+    return;
+  DCHECK_EQ(provider_host_.get(), host_for_cross_site_transfer_.get());
+  context_->TransferProviderHostIn(
+      new_process_id,
+      new_host_id,
+      host_for_cross_site_transfer_.Pass());
+  DCHECK_EQ(provider_host_->provider_id(), new_host_id);
+}
+
 ServiceWorkerRequestHandler::~ServiceWorkerRequestHandler() {
 }