Fix flaky AppsGridViewTest on valgrind bot (Strike 2).

There is also a page transition animation to wait for after timer is fired.

BUG=385167

Review URL: https://codereview.chromium.org/344793005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@278591 0039d316-1c4b-4281-b951-d872f2087c98

ui/app_list/views/test/apps_grid_view_test_api.cc

@@ -46,7 +46,8 @@ void AppsGridViewTestApi::DisableSynchronousDrag() {
 }
 
 bool AppsGridViewTestApi::HasPendingPageFlip() const {
-  return view_->page_flip_timer_.IsRunning();
+  return view_->page_flip_timer_.IsRunning() ||
+         view_->pagination_model()->has_transition();
 }
 
 }  // namespace test