[Downloads] Add support for tracking incomplete downloads

chrome/android/java/src/org/chromium/chrome/browser/download/ui/DownloadManagerUi.java

Index: chrome/android/java/src/org/chromium/chrome/browser/download/ui/DownloadManagerUi.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/download/ui/DownloadManagerUi.java b/chrome/android/java/src/org/chromium/chrome/browser/download/ui/DownloadManagerUi.java
index 2b16659e86abb25c1e7bc9b405c7fae214a1e61e..53197fe7698992a20f17c3438875e2df294907ef 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/download/ui/DownloadManagerUi.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/download/ui/DownloadManagerUi.java
@@ -121,7 +121,7 @@ public class DownloadManagerUi implements OnMenuItemClickListener {
             List<DownloadHistoryItemWrapper> items = (List<DownloadHistoryItemWrapper>) actionData;
 
             // Deletion was undone. Add items back to the adapter.
-            mHistoryAdapter.reAddItemsToAdapter(items);
+            mHistoryAdapter.unmarkItemsForDeletion(items);
 
             RecordUserAction.record("Android.DownloadManager.UndoDelete");
         }
@@ -394,7 +394,7 @@ public class DownloadManagerUi implements OnMenuItemClickListener {
 
         if (itemsToDelete.isEmpty()) return;
 
-        mHistoryAdapter.removeItemsFromAdapter(itemsToDelete);
+        mHistoryAdapter.markItemsForDeletion(itemsToDelete);
 
         dismissUndoDeletionSnackbars();