Enable short notification timeouts by default

Bug: 1134761
Change-Id: Ie2252ac8e57ef0dd2c71d1de523e2f67c58e9a14
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2446527Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Commit-Queue: Ahmed Mehfooz <amehfooz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#813859}

ash/public/cpp/ash_features.cc

@@ -86,7 +86,7 @@ const base::Feature kNotificationExpansionAnimation{
     "NotificationExpansionAnimation", base::FEATURE_DISABLED_BY_DEFAULT};
 
 const base::Feature kNotificationExperimentalShortTimeouts{
-    "NotificationExperimentalShortTimeouts", base::FEATURE_DISABLED_BY_DEFAULT};
+    "NotificationExperimentalShortTimeouts", base::FEATURE_ENABLED_BY_DEFAULT};
 
 const base::Feature kNotificationScrollBar{"NotificationScrollBar",
                                            base::FEATURE_DISABLED_BY_DEFAULT};