Implement the infrastructure of creating WorkerFetchContext in worker global scope.

third_party/WebKit/Source/web/DedicatedWorkerMessagingProxyProviderImpl.cpp

Index: third_party/WebKit/Source/web/DedicatedWorkerMessagingProxyProviderImpl.cpp
diff --git a/third_party/WebKit/Source/web/DedicatedWorkerMessagingProxyProviderImpl.cpp b/third_party/WebKit/Source/web/DedicatedWorkerMessagingProxyProviderImpl.cpp
index cf0153e0110d1db11f297b6e16b069a7c93852cc..58c1397f1ef29d7994b25e0538707f938df52ed7 100644
--- a/third_party/WebKit/Source/web/DedicatedWorkerMessagingProxyProviderImpl.cpp
+++ b/third_party/WebKit/Source/web/DedicatedWorkerMessagingProxyProviderImpl.cpp
@@ -31,10 +31,13 @@
 #include "web/DedicatedWorkerMessagingProxyProviderImpl.h"
 
 #include "core/dom/Document.h"
+#include "core/loader/WorkerFetchContext.h"
 #include "core/workers/DedicatedWorkerMessagingProxy.h"
 #include "core/workers/Worker.h"
 #include "core/workers/WorkerClients.h"
+#include "platform/loader/fetch/ResourceFetcher.h"
 #include "platform/wtf/PtrUtil.h"
+#include "public/platform/Platform.h"
 #include "public/platform/WebContentSettingsClient.h"
 #include "public/platform/WebString.h"
 #include "public/web/WebFrameClient.h"
@@ -67,6 +70,16 @@ DedicatedWorkerMessagingProxyProviderImpl::CreateWorkerMessagingProxy(
         worker_clients,
         WTF::WrapUnique(
             web_frame->Client()->CreateWorkerContentSettingsClientProxy()));
+    std::unique_ptr<WebWorkerFetchContextInfo> web_worker_fetch_context_info =
+        Platform::Current()->CreateWorkerFetchContextInfo();
+    // |web_worker_fetch_context_info| is null if off-main-thread-fetch is
+    // disabled.
+    if (web_worker_fetch_context_info) {
+      // TODO(horo): Set more information about the context (ex: Service Worker
+      // provider ID) to |web_worker_fetch_context_info|.
+      ProvideWorkerFetchContextInfoToWorker(
+          worker_clients, std::move(web_worker_fetch_context_info));
+    }
     // FIXME: call provideServiceWorkerContainerClientToWorker here when we
     // support ServiceWorker in dedicated workers (http://crbug.com/371690)
     return new DedicatedWorkerMessagingProxy(worker, worker_clients);