Enable MacOSX native notifications by default

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 3949411d8017577a9bb1f6dcbf7f27590ad778d0..8990178caeb7349f4f5dad8bf468cc09a1a3f849 100644
--- a/chrome/common/chrome_features.cc
+++ b/chrome/common/chrome_features.cc
@@ -220,9 +220,14 @@ const base::Feature kModuleDatabase{"ModuleDatabase",
 // Enables the use of native notification centers instead of using the Message
 // Center for displaying the toasts.
 #if BUILDFLAG(ENABLE_NATIVE_NOTIFICATIONS)
+#if defined(OS_MACOSX)
+const base::Feature kNativeNotifications{"NativeNotifications",
+                                         base::FEATURE_ENABLED_BY_DEFAULT};
+#else
 const base::Feature kNativeNotifications{"NativeNotifications",
                                          base::FEATURE_DISABLED_BY_DEFAULT};
 #endif
+#endif  // BUILDFLAG(ENABLE_NATIVE_NOTIFICATIONS)
 
 // If enabled, the list of content suggestions on the New Tab page will contain
 // pages that the user downloaded for later use.