Added DownloadItem::Observer to JobController.

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/background_fetch_job_info.h"
 #include "content/browser/background_fetch/background_fetch_request_info.h"
 #include "content/browser/service_worker/service_worker_context_wrapper.h"
 #include "content/public/browser/browser_context.h"
@@ skipping 15 matching lines @@
   // ServiceWorkerContextObserver as a parent class and should register as an
   // observer here.
 }
 
 BackgroundFetchContext::~BackgroundFetchContext() {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 }
 
 void BackgroundFetchContext::Init() {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
-
-  // TODO(harkness): Create the Download observer.
 }
 
 void BackgroundFetchContext::Shutdown() {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 
   BrowserThread::PostTask(
       BrowserThread::IO, FROM_HERE,
       base::Bind(&BackgroundFetchContext::ShutdownOnIO, this));
 }
 
@@ skipping 20 matching lines @@
   if (job_data) {
     // Create a controller which drives the processing of the job. It will use
     // the JobData to get information about individual requests for the job.
     job_map_[job_info.guid()] = base::MakeUnique<BackgroundFetchJobController>(
         job_info.guid(), browser_context_, storage_partition_,
         std::move(job_data));
   }
 }
 
 }  // namespace content