Implement the infrastructure of creating WorkerFetchContext in worker global scope.

third_party/WebKit/public/platform/WebWorkerFetchContextInfo.h

Index: third_party/WebKit/public/platform/WebWorkerFetchContextInfo.h
diff --git a/third_party/WebKit/public/platform/WebWorkerFetchContextInfo.h b/third_party/WebKit/public/platform/WebWorkerFetchContextInfo.h
new file mode 100644
index 0000000000000000000000000000000000000000..dc59bad71ce7e9cd322ee25a368f4ee1b62b87df
--- /dev/null
+++ b/third_party/WebKit/public/platform/WebWorkerFetchContextInfo.h
@@ -0,0 +1,45 @@
+// 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 on the main thread and passed to a
+// worker (dedicated, shared, service worker). It contins information about the

[kinuko, 2017/04/14 14:00:27]

contins -> contains

[horo, 2017/04/17 15:12:04]

Done.

+// resource fetching context (ex: service worker provider id).
+class WebWorkerFetchContextInfo {

[kinuko, 2017/04/14 14:00:26]

I wonder if it's possible to only expose WebWorkerFetchContext.  I think passing
mojo PtrInfo from main thread to worker thread is the main motivation of
WebWorkerFetchContextInfo, is that right?  Naively it feels it's possible that
context directly implements WebWorkerFetchContext, and expose a method like
InitializeOnWorkerThread() where we initialize resource dispatcher and binding_.
 (While-- if it didn't require additional public interfaces I would have been
just happy to have this info class)

[horo, 2017/04/17 15:12:04]

Done.

+ 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