Implement GetJobResponse and merge JobData into DataManager.

content/browser/background_fetch/background_fetch_job_response_data.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_JOB_RESPONSE_DATA_H_
+#define CONTENT_BROWSER_BACKGROUND_FETCH_BACKGROUND_FETCH_JOB_RESPONSE_DATA_H_
+
+#include <memory>
+#include <string>
+#include <vector>
+
+#include "base/callback.h"
+#include "base/callback_forward.h"
+#include "base/macros.h"
+#include "content/public/browser/blob_handle.h"
+
+namespace content {
+
+using BackgroundFetchResponseCompleteCallback =
+    base::Callback<void(std::vector<std::unique_ptr<BlobHandle>>)>;
+
+// Temporary holding class to aggregate the response data for requests
+// associated with a given BackgroundFetch job.
+class BackgroundFetchJobResponseData {
+ public:
+  BackgroundFetchJobResponseData(
+      size_t num_requests,
+      const BackgroundFetchResponseCompleteCallback& completion_callback);
+  ~BackgroundFetchJobResponseData();
+
+  void AddResponse(int request_num, std::unique_ptr<BlobHandle> response);
+  bool IsComplete();
+
+ private:
+  std::vector<std::unique_ptr<BlobHandle>> blobs_;
+  size_t num_requests_ = 0;
+  size_t completed_requests_ = 0;
+  const std::string job_guid_;
+  BackgroundFetchResponseCompleteCallback completion_callback_;
+
+  DISALLOW_COPY_AND_ASSIGN(BackgroundFetchJobResponseData);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_BACKGROUND_FETCH_BACKGROUND_FETCH_JOB_RESPONSE_DATA_H_