Glue OfflineContentProvider to the download service

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

Index: chrome/android/java/src/org/chromium/chrome/browser/download/DownloadNotifier.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/download/DownloadNotifier.java b/chrome/android/java/src/org/chromium/chrome/browser/download/DownloadNotifier.java
index 557446fe9b7b1e833befe5715f6df4337ca297f0..b404bb9607c396fd2a660e14e0f2e6baf056f98b 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/download/DownloadNotifier.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/download/DownloadNotifier.java
@@ -4,6 +4,8 @@
 
 package org.chromium.chrome.browser.download;
 
+import org.chromium.components.offline_items_collection.ContentId;
+
 /**
  * Class for reporting the status of a download.
  */
@@ -50,9 +52,9 @@ public interface DownloadNotifier {
 
     /**
      * 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.