[proof-of-concept] SW thread independent of the main thread

content/browser/service_worker/service_worker_context_wrapper.cc

Index: content/browser/service_worker/service_worker_context_wrapper.cc
diff --git a/content/browser/service_worker/service_worker_context_wrapper.cc b/content/browser/service_worker/service_worker_context_wrapper.cc
index 64ae3ea762f36fabfff18ff825a3dd97d0accf63..3e08b93c1e5b97e6a7432a3a913dea0a4887c3e7 100644
--- a/content/browser/service_worker/service_worker_context_wrapper.cc
+++ b/content/browser/service_worker/service_worker_context_wrapper.cc
@@ -844,4 +844,16 @@ ServiceWorkerContextCore* ServiceWorkerContextWrapper::context() {
   return context_core_.get();
 }
 
+void ServiceWorkerContextWrapper::CreateService(
+    mojo::InterfaceRequest<blink::mojom::ServiceWorkerService> request) {
+  if (!BrowserThread::CurrentlyOn(BrowserThread::IO)) {
+    BrowserThread::PostTask(
+        BrowserThread::IO, FROM_HERE,
+        base::Bind(&ServiceWorkerContextWrapper::CreateService, this,
+                   base::Passed(&request)));
+    return;
+  }
+  context_core_->CreateService(std::move(request));
+}
+
 }  // namespace content