Glue OfflineContentProvider to the download service

chrome/android/java/src/org/chromium/chrome/browser/download/DownloadNotifier.java

 // Copyright 2015 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.
 
 package org.chromium.chrome.browser.download;
 
+import org.chromium.components.offline_items_collection.ContentId;
+
 /**
  * Class for reporting the status of a download.
  */
 public interface DownloadNotifier {
     /**
      * Add a download successful notification.
      * @param downloadInfo info about the successful download.
      * @param systemDownloadId The system download ID assigned to the download.
      * @param canResolve Whether the download can be resolved to any activity.
      * @param isSupportedMimeType Whether the MIME type can be viewed inside browser.
@@ skipping 26 matching lines @@
 
     /**
      * Update the download notification to paused.
      * @param downloadInfo info about in progress download.
      * @param isAutoResumable Whether the download can be auto resumed when network is available.
      */
     void notifyDownloadInterrupted(DownloadInfo downloadInfo, boolean isAutoResumable);
 
     /**
      * Cancel the notification for a download.
-     * @param downloadGuid The GUID of the cancelled download.
+     * @param id The {@link ContentId} of the download.
      */
-    void notifyDownloadCanceled(String downloadGuid);
+    void notifyDownloadCanceled(ContentId id);
 
     /**
      * Remove the download notification for an already finished download.
      * @param notificationId The id of the download notification.
      * @param downloadInfo   Info about the removed download.
      */
     void removeDownloadNotification(int notificationId, DownloadInfo downloadInfo);
 
     /**
      * Called to resume all the pending download entries in SharedPreferences.
      */
     void resumePendingDownloads();
 }