Initial framework setup and skeleton for BackgroundFetchContext

content/browser/background_fetch/background_fetch_context.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_context.h"
+
+#include "content/browser/background_fetch/fetch_request.h"
+#include "content/browser/service_worker/service_worker_context_wrapper.h"
+#include "content/public/browser/browser_context.h"
+#include "content/public/browser/browser_thread.h"
+#include "content/public/browser/download_manager.h"
+#include "content/public/browser/storage_partition.h"
+
+namespace content {
+
+BackgroundFetchContext::BackgroundFetchContext(
+    BrowserContext* browser_context,
+    const scoped_refptr<ServiceWorkerContextWrapper>& service_worker_context)
+    : browser_context_(browser_context),
+      service_worker_context_(service_worker_context),
+      background_fetch_data_manager_(this) {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+}
+
+BackgroundFetchContext::~BackgroundFetchContext() {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+}
+
+void BackgroundFetchContext::Init() {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+
+  // TODO(harkness) Create the Download observer.
+  // TODO(harkness) Create the Batch manager.
+}
+
+void BackgroundFetchContext::Shutdown() {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+}
+
+void BackgroundFetchContext::OnRegistrationDeleted(int64_t registration_id,
+                                                   const GURL& pattern) {
+  // TODO(harkness) Call into the data manager and delete metadata, this will
+  // a call to the DownloadManager to abort any ongoing downloads.
+}
+
+void BackgroundFetchContext::CreateRequest(const FetchRequest& fetch_request) {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+  // Inform the data manager about the new download.
+  background_fetch_data_manager_.CreateRequest(fetch_request);
+
+  // TODO(harkness)ake the request to the download manager.

[Peter Beverloo, 2017/02/14 15:05:52]

Please fix the grammar of this TODO

As a minor aside for future patches, please add a colon after the TODO. Only
6.4% of TODOs in //chrome and //content don't have them.

    // TODO(foo): bar

[harkness, 2017/02/15 13:48:44]

Done.

+}
+
+}  // namespace content