Implement the infrastructure of creating WorkerFetchContext in worker global scope.

third_party/WebKit/Source/web/WebSharedWorkerImpl.cpp

Index: third_party/WebKit/Source/web/WebSharedWorkerImpl.cpp
diff --git a/third_party/WebKit/Source/web/WebSharedWorkerImpl.cpp b/third_party/WebKit/Source/web/WebSharedWorkerImpl.cpp
index 9f0e0963d6edaa02f0cde45b4c88bd069791d8ba..159a8af8d838af4741794f65c8b271ceecc4e056 100644
--- a/third_party/WebKit/Source/web/WebSharedWorkerImpl.cpp
+++ b/third_party/WebKit/Source/web/WebSharedWorkerImpl.cpp
@@ -37,6 +37,7 @@
 #include "core/loader/FrameLoadRequest.h"
 #include "core/loader/FrameLoader.h"
 #include "core/loader/ThreadableLoadingContext.h"
+#include "core/loader/WorkerFetchContext.h"
 #include "core/probe/CoreProbes.h"
 #include "core/workers/ParentFrameTaskRunners.h"
 #include "core/workers/SharedWorkerGlobalScope.h"
@@ -48,6 +49,7 @@
 #include "core/workers/WorkerScriptLoader.h"
 #include "core/workers/WorkerThreadStartupData.h"
 #include "platform/CrossThreadFunctional.h"
+#include "platform/RuntimeEnabledFeatures.h"
 #include "platform/heap/Handle.h"
 #include "platform/heap/Persistent.h"
 #include "platform/loader/fetch/ResourceResponse.h"
@@ -61,6 +63,7 @@
 #include "public/platform/WebString.h"
 #include "public/platform/WebURL.h"
 #include "public/platform/WebURLRequest.h"
+#include "public/platform/WebWorkerFetchContext.h"
 #include "public/platform/modules/serviceworker/WebServiceWorkerNetworkProvider.h"
 #include "public/web/WebDevToolsAgent.h"
 #include "public/web/WebFrame.h"
@@ -339,6 +342,17 @@ void WebSharedWorkerImpl::OnScriptLoaderFinished() {
           web_security_origin)));
   ProvideIndexedDBClientToWorker(worker_clients,
                                  IndexedDBClientImpl::Create(*worker_clients));
+
+  if (RuntimeEnabledFeatures::offMainThreadFetchEnabled()) {
+    std::unique_ptr<WebWorkerFetchContext> web_worker_fetch_context =
+        WTF::WrapUnique(client_->CreateWorkerFetchContext());
+    DCHECK(web_worker_fetch_context);

[kinuko, 2017/04/20 04:08:14]

We could get ServiceWorkerNetworkProvider here and set necessary info too, is
that right?

[horo, 2017/04/20 08:35:43]

Done.

+    // TODO(horo): Set more information about the context (ex: DataSaverEnabled)
+    // to |web_worker_fetch_context|.
+    ProvideWorkerFetchContextToWorker(worker_clients,
+                                      std::move(web_worker_fetch_context));
+  }
+
   ContentSecurityPolicy* content_security_policy =
       main_script_loader_->ReleaseContentSecurityPolicy();
   WorkerThreadStartMode start_mode =
@@ -423,6 +437,13 @@ void WebSharedWorkerImpl::DispatchDevToolsMessage(int session_id,
                                                message);
 }
 
+WebServiceWorkerNetworkProvider*
+WebSharedWorkerImpl::GetServiceWorkerNetworkProvider() {
+  WebLocalFrameImpl* webFrame =
+      WebLocalFrameImpl::FromFrame(main_frame_->GetFrame());
+  return webFrame->DataSource()->GetServiceWorkerNetworkProvider();
+}
+
 WebSharedWorker* WebSharedWorker::Create(WebSharedWorkerClient* client) {
   return new WebSharedWorkerImpl(client);
 }