Create the BackgroundFetchBatchManager and initiate a download.

content/browser/background_fetch/background_fetch_job_data.cc

+// 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.
+
+#include "content/browser/background_fetch/background_fetch_job_data.h"
+
+#include "base/memory/ptr_util.h"
+#include "content/browser/background_fetch/background_fetch_job_info.h"
+
+namespace content {
+
+BackgroundFetchJobData::BackgroundFetchJobData(
+    BackgroundFetchRequestInfos request_infos)
+    : request_infos_(std::move(request_infos)) {}
+
+BackgroundFetchJobData::~BackgroundFetchJobData() {}
+
+// TODO(harkness): Provide more detail about status and where the returned data
+// is now available.
+bool BackgroundFetchJobData::BackgroundFetchRequestInfoComplete(
+    const std::string& fetch_guid) {
+  // Make sure that the request was expected to be in-progress.
+  auto index_iter = request_info_index_.find(fetch_guid);
+  DCHECK(index_iter != request_info_index_.end());
+  DCHECK_EQ(fetch_guid, request_infos_[index_iter->second].guid());
+
+  // Set the request as complete and delete it from the in-progress index.
+  request_infos_[index_iter->second].set_complete(true);
+  request_info_index_.erase(index_iter);
+
+  // Return a boolean indicating whether there are more requests to be
+  // processed.
+  return next_request_info_ != request_infos_.size();
+}
+
+const BackgroundFetchRequestInfo&
+BackgroundFetchJobData::GetNextBackgroundFetchRequestInfo() {
+  DCHECK(next_request_info_ != request_infos_.size());
+
+  const BackgroundFetchRequestInfo& next_request =
+      request_infos_[next_request_info_];
+  DCHECK(!next_request.complete());
+  request_info_index_[next_request.guid()] = next_request_info_++;
+
+  return next_request;
+}
+
+bool BackgroundFetchJobData::IsComplete() const {
+  return ((next_request_info_ == request_infos_.size()) &&
+          request_info_index_.empty());
+}
+
+bool BackgroundFetchJobData::HasRequestsRemaining() const {
+  return next_request_info_ != request_infos_.size();
+}
+
+}  // namespace content