Set the requester context info to the requests for off-main-thread-fetch.

content/renderer/shared_worker/embedded_shared_worker_stub.cc

Index: content/renderer/shared_worker/embedded_shared_worker_stub.cc
diff --git a/content/renderer/shared_worker/embedded_shared_worker_stub.cc b/content/renderer/shared_worker/embedded_shared_worker_stub.cc
index 090ba0ea4fd31039ad3866583fe56dec69014507..582de2c21a28c017f56a0524122eebced6e78493 100644
--- a/content/renderer/shared_worker/embedded_shared_worker_stub.cc
+++ b/content/renderer/shared_worker/embedded_shared_worker_stub.cc
@@ -272,6 +272,7 @@ EmbeddedSharedWorkerStub::CreateWorkerFetchContext(
   std::unique_ptr<WorkerFetchContextImpl> worker_fetch_context =
       base::MakeUnique<WorkerFetchContextImpl>(
           worker_url_loader_factory_provider.PassInterface());
+  worker_fetch_context->set_is_secure_context(IsOriginSecure(url_));

[falken, 2017/05/17 08:40:26]

secure context usually means all the ancestor contexts are secure.

I guess we don't any kind of ancestor check here because the worker is its own
top-level context? Maybe we should comment that assumption just to be explicit.

[horo, 2017/05/17 10:33:53]

Added comment.

   if (web_network_provider) {
     ServiceWorkerNetworkProvider* network_provider =
         ServiceWorkerNetworkProvider::FromWebServiceWorkerNetworkProvider(