Implement the infrastructure of creating WorkerFetchContext in worker global scope.

content/renderer/service_worker/service_worker_fetch_context_impl.h

+// 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.
+
+#ifndef CONTENT_RENDERER_SERVICE_WORKER_SERVICE_WORKER_FETCH_CONTEXT_IMPL_H_
+#define CONTENT_RENDERER_SERVICE_WORKER_SERVICE_WORKER_FETCH_CONTEXT_IMPL_H_
+
+#include "content/common/worker_url_loader_factory_provider.mojom.h"
+#include "third_party/WebKit/public/platform/WebWorkerFetchContext.h"
+
+namespace base {
+class SingleThreadTaskRunner;
+}  // namespace base
+
+namespace content {
+class ResourceDispatcher;
+
+class ServiceWorkerFetchContextImpl : public blink::WebWorkerFetchContext {
+ public:
+  ServiceWorkerFetchContextImpl(
+      mojom::WorkerURLLoaderFactoryProviderPtrInfo provider_info,
+      int service_worker_provider_id);
+  ~ServiceWorkerFetchContextImpl() override;
+
+  // blink::WebWorkerFetchContext implementation:
+  void InitializeOnWorkerThread(base::SingleThreadTaskRunner*) override;
+  blink::WebURLLoader* CreateURLLoader() override;
+  void WillSendRequest(blink::WebURLRequest&) override;
+  bool IsControlledByServiceWorker() const override;
+
+ private:
+  mojom::WorkerURLLoaderFactoryProviderPtrInfo provider_info_;
+  const int service_worker_provider_id_;
+
+  // Initialized on the worker thread when InitializeOnWorkerThread() is called.
+  std::unique_ptr<ResourceDispatcher> resource_dispatcher_;

[yhirano, 2017/04/20 04:26:59]

ResourceDispatcher::main_thread_task_runner_ becomes a very confusing name with
this change. I think we should add a TODO comment or rename it.

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

Done.

+  mojom::WorkerURLLoaderFactoryProviderPtr provider_;
+  mojom::URLLoaderFactoryAssociatedPtr url_loader_factory_;
+};
+
+}  // namespace content
+
+#endif  // CONTENT_RENDERER_SERVICE_WORKER_SERVICE_WORKER_FETCH_CONTEXT_IMPL_H_