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

third_party/WebKit/Source/core/loader/WorkerFetchContext.cpp

 // Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/loader/WorkerFetchContext.h"
 
 #include "core/frame/Deprecation.h"
 #include "core/frame/UseCounter.h"
 #include "core/workers/WorkerClients.h"
 #include "core/workers/WorkerGlobalScope.h"
@@ skipping 147 matching lines @@
   return web_context_->CreateURLLoader();
 }
 
 bool WorkerFetchContext::IsControlledByServiceWorker() const {
   return web_context_->IsControlledByServiceWorker();
 }
 
 void WorkerFetchContext::PrepareRequest(ResourceRequest& request,
                                         RedirectType) {
   request.OverrideLoadingIPCType(WebURLRequest::LoadingIPCType::kMojo);
+  if (request.RequestorOrigin()->IsUnique())
+    request.SetRequestorOrigin(worker_global_scope_->GetSecurityOrigin());
   WrappedResourceRequest webreq(request);
   web_context_->WillSendRequest(webreq);
 }
 
 RefPtr<WebTaskRunner> WorkerFetchContext::LoadingTaskRunner() const {
   return loading_task_runner_;
 }
 
 void WorkerFetchContext::AddAdditionalRequestHeaders(ResourceRequest& request,
                                                      FetchResourceType type) {
@@ skipping 16 matching lines @@
 void ProvideWorkerFetchContextToWorker(
     WorkerClients* clients,
     std::unique_ptr<WebWorkerFetchContext> web_context) {
   DCHECK(clients);
   WorkerFetchContextHolder::ProvideTo(
       *clients, WorkerFetchContextHolder::SupplementName(),
       new WorkerFetchContextHolder(std::move(web_context)));
 }
 
 }  // namespace blink