Implement the infrastructure of creating WorkerFetchContext in worker global scope.

third_party/WebKit/public/platform/WebWorkerFetchContextInfo.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 WebWorkerFetchContextInfo_h
+#define WebWorkerFetchContextInfo_h
+
+namespace base {
+class SingleThreadTaskRunner;
+}  // namespace base
+
+namespace blink {
+
+class WebWorkerFetchContext;
+
+// WebWorkerFetchContextInfo is created in a main thread and passed to worker

[kinuko, 2017/04/14 02:27:02]

nit: in a main thread -> on the main thread
passed to worker -> passed to a worker

[horo, 2017/04/14 07:22:45]

Done.

+// (dedicated, shared, service worker). It contins a information about the

[kinuko, 2017/04/14 02:27:02]

a information -> information

[horo, 2017/04/14 07:22:45]

Done.

+// resource fetching context (ex: service worker provider id).
+class WebWorkerFetchContextInfo {
+ public:
+  virtual ~WebWorkerFetchContextInfo() {}
+
+  // Creates a WebWorkerFetchContext in the worker thread which will be used
+  // when the worker thread fetches resrouces.
+  virtual std::unique_ptr<WebWorkerFetchContext> CreateContext(
+      base::SingleThreadTaskRunner*) = 0;
+
+  void SetServiceWorkerProviderID(int id) { service_worker_provider_id_ = id; }
+  void SetIsControlledByServiceWorker(bool flag) {
+    is_controlled_by_service_worker_ = flag;
+  }
+
+  int GetServiceWorkerProviderID() const { return service_worker_provider_id_; }
+  bool IsControlledByServiceWorker() const {
+    return is_controlled_by_service_worker_;
+  }
+
+ private:
+  int service_worker_provider_id_ = -1;
+  bool is_controlled_by_service_worker_ = false;
+};
+
+}  // namespace blink
+
+#endif  // WebWorkerFetchContextInfo_h