chromium/components/browser_ui/styles/android/java/res/color/filled_button_bg_dynamic_list.xml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:alpha="@dimen/filled_button_bg_disabled_alpha" android:color="?attr/colorOnSurface"
        android:state_enabled="false" />
    <item android:color="?attr/colorPrimary"/>
</selector>