[iOS] Remove cell separators from empty portion of reading list table.

Bug: 862307
Cq-Include-Trybots: luci.chromium.try:ios-simulator-full-configs;master.tryserver.chromium.mac:ios-simulator-cronet
Change-Id: I19f4051c152b0933d3142f734e9a253bea2b577d
Reviewed-on: https://chromium-review.googlesource.com/1137257Reviewed-by: Gauthier Ambard <gambard@chromium.org>
Commit-Queue: Kurt Horimoto <kkhorimoto@chromium.org>
Cr-Commit-Position: refs/heads/master@{#575407}

ios/chrome/browser/ui/reading_list/reading_list_table_view_controller.mm

@@ -184,6 +184,11 @@ ReadingListSelectionState GetSelectionStateForSelectedCounts(
   self.tableView.estimatedSectionHeaderHeight = 56;
   self.tableView.allowsMultipleSelectionDuringEditing = YES;
   self.tableView.allowsMultipleSelection = YES;
+  // Add a tableFooterView in order to disable separators at the bottom of the
+  // tableView.
+  // TODO(crbug.com/863606): Remove this workaround when iOS10 is no longer
+  // supported, as it is not necessary in iOS 11.
+  self.tableView.tableFooterView = [[UIView alloc] init];
 
   // Add gesture recognizer for the context menu.
   UILongPressGestureRecognizer* longPressRecognizer =