Adding status info to DownloadUIItem and piping it through.

chrome/android/java/src/org/chromium/chrome/browser/offlinepages/downloads/OfflinePageDownloadBridge.java

 // Copyright 2016 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.offlinepages.downloads;
 
 import android.content.ComponentName;
 import android.support.annotation.Nullable;
 
 import org.chromium.base.ObserverList;
@@ skipping 238 matching lines @@
     void downloadItemUpdated(OfflinePageDownloadItem item) {
         assert item != null;
 
         for (Observer observer : mObservers) {
             observer.onItemUpdated(item);
         }
     }
 
     @CalledByNative
     static void createDownloadItemAndAddToList(List<OfflinePageDownloadItem> list, String guid,
-            String url, String title, String targetPath, long startTimeMs, long totalBytes) {
-        list.add(createDownloadItem(guid, url, title, targetPath, startTimeMs, totalBytes));
+            String url, int downloadState, long downloadProgressBytes, String title,
+            String targetPath, long startTimeMs, long totalBytes) {
+        list.add(createDownloadItem(guid, url, downloadState, downloadProgressBytes, title,
+                targetPath, startTimeMs, totalBytes));
     }
 
     @CalledByNative
-    static OfflinePageDownloadItem createDownloadItem(
-            String guid, String url, String title, String targetPath,
-            long startTimeMs, long totalBytes) {
-        return new OfflinePageDownloadItem(guid, url, title, targetPath, startTimeMs, totalBytes);
+    static OfflinePageDownloadItem createDownloadItem(String guid, String url, int downloadState,
+            long downloadProgressBytes, String title, String targetPath, long startTimeMs,
+            long totalBytes) {
+        return new OfflinePageDownloadItem(guid, url, downloadState, downloadProgressBytes, title,
+                targetPath, startTimeMs, totalBytes);
     }
 
     private native long nativeInit(Profile profile);
     private native void nativeDestroy(long nativeOfflinePageDownloadBridge);
     native void nativeGetAllItems(
             long nativeOfflinePageDownloadBridge, List<OfflinePageDownloadItem> items);
     native OfflinePageDownloadItem nativeGetItemByGuid(
             long nativeOfflinePageDownloadBridge, String guid);
     native void nativeCancelDownload(long nativeOfflinePageDownloadBridge, String guid);
     native void nativePauseDownload(long nativeOfflinePageDownloadBridge, String guid);
     native void nativeResumeDownload(long nativeOfflinePageDownloadBridge, String guid);
     native void nativeDeleteItemByGuid(long nativeOfflinePageDownloadBridge, String guid);
     native long nativeGetOfflineIdByGuid(long nativeOfflinePageDownloadBridge, String guid);
     native void nativeStartDownload(long nativeOfflinePageDownloadBridge, Tab tab);
 }