Permanently turn on auto-dismissing dialogs.

chrome/common/chrome_features.cc

Index: chrome/common/chrome_features.cc
diff --git a/chrome/common/chrome_features.cc b/chrome/common/chrome_features.cc
index 4181b412a392b441feb1f30bd86c2fc5fb199234..59f1203c1f5ccb93cae28489c245fb5f398dd2d4 100644
--- a/chrome/common/chrome_features.cc
+++ b/chrome/common/chrome_features.cc
@@ -40,12 +40,6 @@ const base::Feature kArcMemoryManagement{
 const base::Feature kAssetDownloadSuggestionsFeature{
     "NTPAssetDownloadSuggestions", base::FEATURE_ENABLED_BY_DEFAULT};
 
-#if !defined(OS_ANDROID) && !defined(OS_IOS)
-// Enables auto-dismissing JavaScript dialogs.
-const base::Feature kAutoDismissingDialogs{"AutoDismissingDialogs",
-                                           base::FEATURE_ENABLED_BY_DEFAULT};
-#endif
-
 #if defined(OS_WIN) || defined(OS_MACOSX)
 // Enables automatic tab discarding, when the system is in low memory state.
 const base::Feature kAutomaticTabDiscarding{"AutomaticTabDiscarding",