[M125] Disable top chrome font flag

The TopChromeFont flag for ChromeRefresh2023 was experimented with and
we found that the disabled version was the recommended font style,
this was launched, but the default was never changed to be "disabled"
This CL sets the default, and will be merged back to M125, and then
in M126+ it will be phased out.

(cherry picked from commit 222a94b54bf69f7fd31657df0edb80cef1f5e966)

Bug: 335553327
Change-Id: I8009bd4d05a853531ff5d38f96a1a31e59c519af
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5472326
Reviewed-by: Dana Fried <dfried@chromium.org>
Commit-Queue: Dana Fried <dfried@chromium.org>
Cr-Original-Commit-Position: refs/heads/main@{#1290858}
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5496382
Reviewed-by: Peter Boström <pbos@chromium.org>
Commit-Queue: David Pennington <dpenning@chromium.org>
Cr-Commit-Position: refs/branch-heads/6422@{#476}
Cr-Branched-From: 9012208d0ce02e0cf0adb9b62558627c356f3278-refs/heads/main@{#1287751}
diff --git a/ui/base/ui_base_features.cc b/ui/base/ui_base_features.cc
index 7d5b878..d095fe9 100644
--- a/ui/base/ui_base_features.cc
+++ b/ui/base/ui_base_features.cc
@@ -561,7 +561,7 @@
 
 BASE_FEATURE(kChromeRefresh2023TopChromeFont,
              "ChromeRefresh2023TopChromeFont",
-             base::FEATURE_ENABLED_BY_DEFAULT);
+             base::FEATURE_DISABLED_BY_DEFAULT);
 
 bool IsChromeRefresh2023() {
   if (!CustomizeChromeSupportsChromeRefresh2023()) {