[ios] Reloads Bookmark tableView after loading model.

Bug: 866860
Cq-Include-Trybots: luci.chromium.try:ios-simulator-full-configs;master.tryserver.chromium.mac:ios-simulator-cronet
Change-Id: I321613158bac990345f01e46e34153eb84091411
Reviewed-on: https://chromium-review.googlesource.com/1148588Reviewed-by: Rohit Rao <rohitrao@chromium.org>
Commit-Queue: Sergio Collazos <sczs@chromium.org>
Cr-Commit-Position: refs/heads/master@{#577975}

ios/chrome/browser/ui/bookmarks/bookmark_home_view_controller.mm

@@ -876,6 +876,7 @@ const CGFloat kShadowRadius = 12.0f;
           self.spinnerView = nil;
         }];
     [strongSelf loadBookmarkViews];
+    [strongSelf.sharedState.tableView reloadData];
   }];
 }