[WIP] off-main-thread loading

third_party/WebKit/Source/web/WebEmbeddedWorkerImpl.cpp

Index: third_party/WebKit/Source/web/WebEmbeddedWorkerImpl.cpp
diff --git a/third_party/WebKit/Source/web/WebEmbeddedWorkerImpl.cpp b/third_party/WebKit/Source/web/WebEmbeddedWorkerImpl.cpp
index 626956c7ecc84603cab1db5d46b7f5b7bff3f99a..2c70a201e9154470227aaf278aff07d9372fa47d 100644
--- a/third_party/WebKit/Source/web/WebEmbeddedWorkerImpl.cpp
+++ b/third_party/WebKit/Source/web/WebEmbeddedWorkerImpl.cpp
@@ -38,6 +38,7 @@
 #include "core/inspector/ConsoleMessage.h"
 #include "core/loader/FrameLoadRequest.h"
 #include "core/loader/ThreadableLoadingContext.h"
+#include "core/loader/WorkerFetchContext.h"
 #include "core/probe/CoreProbes.h"
 #include "core/workers/ParentFrameTaskRunners.h"
 #include "core/workers/WorkerClients.h"
@@ -333,6 +334,7 @@ void WebEmbeddedWorkerImpl::loadShadowPage() {
 void WebEmbeddedWorkerImpl::didFinishDocumentLoad(WebLocalFrame* frame) {
   DCHECK_EQ(frame, m_mainFrame);
   DCHECK(!m_mainScriptLoader);
+  DCHECK(!m_webWorkerFetchContextInfo);
   DCHECK(m_mainFrame);
   DCHECK(m_workerContextClient);
   DCHECK(m_loadingShadowPage);
@@ -340,6 +342,8 @@ void WebEmbeddedWorkerImpl::didFinishDocumentLoad(WebLocalFrame* frame) {
   m_loadingShadowPage = false;
   frame->dataSource()->setServiceWorkerNetworkProvider(WTF::wrapUnique(
       m_workerContextClient->createServiceWorkerNetworkProvider()));
+  m_webWorkerFetchContextInfo = WTF::wrapUnique(
+      m_workerContextClient->createServiceWorkerFetchContextInfo());
   m_mainScriptLoader = WorkerScriptLoader::create();
   m_mainScriptLoader->setRequestContext(
       WebURLRequest::RequestContextServiceWorker);
@@ -430,6 +434,16 @@ void WebEmbeddedWorkerImpl::startWorkerThread() {
       workerClients,
       WTF::wrapUnique(m_workerContextClient->createServiceWorkerProvider()));
 
+  // |m_webWorkerFetchContextInfo| is null if off-main-thread-fetch is disabled.
+  if (m_webWorkerFetchContextInfo) {
+    provideWorkerFetchContextInfoToWorker(
+        workerClients, std::move(m_webWorkerFetchContextInfo));
+    WorkerFetchContextInfo* workerFetchContextInfo =
+        WorkerFetchContextInfo::from(*workerClients);
+    workerFetchContextInfo->setDataSaverEnabled(
+        document->frame()->settings()->getDataSaverEnabled());
+  }
+
   // We need to set the CSP to both the shadow page's document and the
   // ServiceWorkerGlobalScope.
   document->initContentSecurityPolicy(