Implement a Mojo service for Background Fetch

content/browser/background_fetch/background_fetch_service_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_BROWSER_BACKGROUND_FETCH_BACKGROUND_FETCH_SERVICE_IMPL_H_
+#define CONTENT_BROWSER_BACKGROUND_FETCH_BACKGROUND_FETCH_SERVICE_IMPL_H_
+
+#include <string>
+
+#include "base/macros.h"
+#include "base/memory/ref_counted.h"
+#include "third_party/WebKit/public/platform/modules/background_fetch/background_fetch.mojom.h"
+
+namespace content {
+
+class BackgroundFetchContext;
+class ServiceWorkerContextWrapper;
+
+class BackgroundFetchServiceImpl : public blink::mojom::BackgroundFetchService {
+ public:
+  BackgroundFetchServiceImpl(
+      BackgroundFetchContext* background_fetch_context,

[dcheng, 2017/03/16 07:14:07]

Nit: these are refcounted and this class takes a reference, so we should pass as
scoped_refptr. For bonus points, pass by value and std::move() where appropriate
to avoid refcount churn.

[Peter Beverloo, 2017/03/16 15:32:55]

Bonus points acquired!

+      ServiceWorkerContextWrapper* service_worker_context);
+  ~BackgroundFetchServiceImpl() override;
+
+  static void Create(BackgroundFetchContext* background_fetch_context,
+                     ServiceWorkerContextWrapper* service_worker_context,
+                     blink::mojom::BackgroundFetchServiceRequest request);
+
+  // blink::mojom::BackgroundFetchService implementation.
+  void UpdateUI(int64_t service_worker_registration_id,
+                const std::string& tag,
+                const std::string& title,
+                const UpdateUICallback& callback) override;
+  void Abort(int64_t service_worker_registration_id,
+             const std::string& tag) override;
+  void GetRegistration(int64_t service_worker_registration_id,
+                       const std::string& tag,
+                       const GetRegistrationCallback& callback) override;
+  void GetTags(int64_t service_worker_registration_id,
+               const GetTagsCallback& callback) override;
+
+ private:
+  scoped_refptr<BackgroundFetchContext> background_fetch_context_;
+  scoped_refptr<ServiceWorkerContextWrapper> service_worker_context_;
+
+  DISALLOW_COPY_AND_ASSIGN(BackgroundFetchServiceImpl);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_BACKGROUND_FETCH_BACKGROUND_FETCH_SERVICE_IMPL_H_