Disable css preferred text scale: do not expose the user's preferred font scale to CSS.

build/cromite_patches_list.txt

@@ -300,6 +300,7 @@ Disable-Android-Tab-Declutter.patch
 Disable-CSSDynamicRangeLimit.patch
 Android-Import-Passwords.patch
 Disable-prefers-reduced-motion.patch
+Disable-css-preferred-text-scale.patch
 
 # temporary or wip patches
 Temp-PerformanceNavigationTiming-privacy-fix.patch

build/patches/Disable-css-preferred-text-scale.patch

@@ -0,0 +1,33 @@
+From: uazo <uazo@users.noreply.github.com>
+Date: Sat, 28 Jun 2025 08:16:28 +0000
+Subject: Disable css preferred text scale
+
+Do not expose the user's preferred font scale to CSS.
+
+License: GPL-2.0-or-later - https://spdx.org/licenses/GPL-2.0-or-later.html
+---
+ .../blink/common/features_cc/Disable-CSSPreferredTextScale.inc | 1 +
+ .../blink/renderer/platform/runtime_enabled_features.json5     | 3 +--
+ 2 files changed, 2 insertions(+), 2 deletions(-)
+ create mode 100644 cromite_flags/third_party/blink/common/features_cc/Disable-CSSPreferredTextScale.inc
+
+diff --git a/cromite_flags/third_party/blink/common/features_cc/Disable-CSSPreferredTextScale.inc b/cromite_flags/third_party/blink/common/features_cc/Disable-CSSPreferredTextScale.inc
+new file mode 100644
+--- /dev/null
++++ b/cromite_flags/third_party/blink/common/features_cc/Disable-CSSPreferredTextScale.inc
+@@ -0,0 +1 @@
++SET_CROMITE_FEATURE_DISABLED(kCSSPreferredTextScale);
+diff --git a/third_party/blink/renderer/platform/runtime_enabled_features.json5 b/third_party/blink/renderer/platform/runtime_enabled_features.json5
+--- a/third_party/blink/renderer/platform/runtime_enabled_features.json5
++++ b/third_party/blink/renderer/platform/runtime_enabled_features.json5
+@@ -1376,8 +1376,7 @@
+       status: "test",
+     },
+     {
+-      name: "CSSPreferredTextScale",
+-      status: "stable",
++      name: "CSSPreferredTextScale", status: "test", public: true
+     },
+     // https://drafts.csswg.org/css-values-5/#progress
+     // progress()
+--