app_list: OnExtensionLoaded calls UpdateResults asynchronously rather than directly.

chrome/browser/ui/app_list/search/app_search_provider_unittest.cc

Index: chrome/browser/ui/app_list/search/app_search_provider_unittest.cc
diff --git a/chrome/browser/ui/app_list/search/app_search_provider_unittest.cc b/chrome/browser/ui/app_list/search/app_search_provider_unittest.cc
index 7b34130616ed49dbf0ad5bc42774f66036e73b39..b59c139b4c3aa02f40f7f1f9e1f4d8fdbea52b2b 100644
--- a/chrome/browser/ui/app_list/search/app_search_provider_unittest.cc
+++ b/chrome/browser/ui/app_list/search/app_search_provider_unittest.cc
@@ -107,6 +107,10 @@ TEST_F(AppSearchProviderTest, Uninstall) {
                                extensions::UNINSTALL_REASON_FOR_TESTING,
                                base::Bind(&base::DoNothing),
                                NULL);
+
+  // Allow async AppSearchProvider::UpdateResults to run.
+  base::RunLoop().RunUntilIdle();
+
   // Uninstalling an app should update the result list without needing to start
   // a new search.
   EXPECT_TRUE(results().empty());