CrOS Shelf: Re-enable tooltip test with hotseat enabled

Bug: 1016823
Change-Id: Ia746987fc8e4f3b4e955f51e0771a541cee90a6b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2001187
Commit-Queue: Manu Cornet <manucornet@chromium.org>
Commit-Queue: Alex Newcomer <newcomer@chromium.org>
Reviewed-by: Alex Newcomer <newcomer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#731632}

ash/shelf/shelf_view_unittest.cc

@@ -1509,9 +1509,6 @@ class HotseatShelfViewTest : public ShelfViewTest,
 INSTANTIATE_TEST_SUITE_P(All, HotseatShelfViewTest, testing::Bool());
 
 TEST_P(HotseatShelfViewTest, ShouldHideTooltipTest) {
-  // TODO(https://crbug.com/1016823): Fix this test for the hotseat.
-  if (chromeos::switches::ShouldShowShelfHotseat())
-    return;
 
   ShelfID app_button_id = AddAppShortcut();
   ShelfID platform_button_id = AddApp();