Refactors the auto-launch logic and adds tests for it.

ui/app_list/test/app_list_test_view_delegate.cc

Index: ui/app_list/test/app_list_test_view_delegate.cc
diff --git a/ui/app_list/test/app_list_test_view_delegate.cc b/ui/app_list/test/app_list_test_view_delegate.cc
index dfe82f59460fa7c6dcd260d59ace7ecb962fc9a5..44644d429e422268af9e5783277838d1bcfd2d0d 100644
--- a/ui/app_list/test/app_list_test_view_delegate.cc
+++ b/ui/app_list/test/app_list_test_view_delegate.cc
@@ -95,7 +95,11 @@ void AppListTestViewDelegate::OpenSearchResult(SearchResult* result,
 }
 
 base::TimeDelta AppListTestViewDelegate::GetAutoLaunchTimeout() {
-  return base::TimeDelta();
+  return auto_launch_timeout_;
+}
+
+void AppListTestViewDelegate::AutoLaunchCanceled() {
+  auto_launch_timeout_ = base::TimeDelta();
 }
 
 void AppListTestViewDelegate::Dismiss() {