Add support for pulling icons for OfflineItems

chrome/android/java/src/org/chromium/chrome/browser/download/items/OfflineContentAggregatorNotificationBridgeUiFactory.java

 // 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.
 
 package org.chromium.chrome.browser.download.items;
 
 import org.chromium.base.ThreadUtils;
+import org.chromium.chrome.browser.download.DownloadManagerService;
+import org.chromium.chrome.browser.download.DownloadNotifier;
 import org.chromium.chrome.browser.profiles.Profile;
 import org.chromium.components.offline_items_collection.OfflineContentProvider;
 
 /**
  * A factory meant to hold a singleton bridge between the notification UI and an
  * {@link OfflineContentProvider}.
  */
 public class OfflineContentAggregatorNotificationBridgeUiFactory {
     private static OfflineContentAggregatorNotificationBridgeUi sBridgeUi;
 
     /**
      * @return An {@link OfflineContentAggregatorNotificationBridgeUi} instance singleton.  If one
      *         is not available this will create a new one.
      */
     public static OfflineContentAggregatorNotificationBridgeUi instance() {
         ThreadUtils.assertOnUiThread();
         if (sBridgeUi == null) {
             Profile profile = Profile.getLastUsedProfile();
             OfflineContentProvider provider = OfflineContentAggregatorFactory.forProfile(profile);
+            DownloadNotifier ui =
+                    DownloadManagerService.getDownloadManagerService().getDownloadNotifier();
 
-            sBridgeUi = new OfflineContentAggregatorNotificationBridgeUi(provider);
+            sBridgeUi = new OfflineContentAggregatorNotificationBridgeUi(provider, ui);
         }
 
         return sBridgeUi;
     }
 
     /**
      * Destroys the internal singleton for {@link OfflineContentAggregatorNotificationBridgeUi} if
      * one exists.
      */
     public static void destroy() {
         ThreadUtils.assertOnUiThread();
         if (sBridgeUi == null) return;
 
         sBridgeUi.destroy();
         sBridgeUi = null;
     }
 
     private OfflineContentAggregatorNotificationBridgeUiFactory() {}
 }