cbuiv: run callback when ImportLockDialog is dismissed

This dialog requires its completion callback to be run even when the
dialog is closed without either accepting or cancelling it, so wire
that up.

Bug: 1163052
Change-Id: Ibd7232b5addbf6f30e39050c7e955207670b0153
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2618097Reviewed-by: Taylor Bergquist <tbergquist@chromium.org>
Commit-Queue: Elly Fong-Jones <ellyjones@chromium.org>
Cr-Commit-Position: refs/heads/master@{#845190}

chrome/browser/ui/views/importer/import_lock_dialog_view.cc

@@ -62,6 +62,8 @@ ImportLockDialogView::ImportLockDialogView(
       base::BindOnce(done_callback, base::Unretained(this), true));
   SetCancelCallback(
       base::BindOnce(done_callback, base::Unretained(this), false));
+  SetCloseCallback(
+      base::BindOnce(done_callback, base::Unretained(this), false));
 
   SetShowCloseButton(false);
   set_fixed_width(views::LayoutProvider::Get()->GetDistanceMetric(