Revert of [Template Expressions] changing ${ leader to $i18n{

chrome/browser/resources/ntp4/new_incognito_tab_theme.css

Index: chrome/browser/resources/ntp4/new_incognito_tab_theme.css
diff --git a/chrome/browser/resources/ntp4/new_incognito_tab_theme.css b/chrome/browser/resources/ntp4/new_incognito_tab_theme.css
index 62ec0921507017397112bb1248940c3437bd6f6b..496b95b99f8ef3b5fe870d93e3f829ff71ebf948 100644
--- a/chrome/browser/resources/ntp4/new_incognito_tab_theme.css
+++ b/chrome/browser/resources/ntp4/new_incognito_tab_theme.css
@@ -5,21 +5,21 @@
 
 html {
   background-attachment: fixed;
-  background-color: $i18n{colorBackground};
-  background-position: $i18n{backgroundBarDetached};
-  background-repeat: $i18n{backgroundTiling};
+  background-color: ${colorBackground};
+  background-position: ${backgroundBarDetached};
+  background-repeat: ${backgroundTiling};
   height: 100%;
   overflow: auto;
 }
 
 html[hascustombackground='true'] {
-  background-image: url(chrome://theme/IDR_THEME_NTP_BACKGROUND?$i18n{themeId});
+  background-image: url(chrome://theme/IDR_THEME_NTP_BACKGROUND?${themeId});
 }
 
 html[bookmarkbarattached='true'] {
-  background-position: $i18n{backgroundBarAttached};
+  background-position: ${backgroundBarAttached};
 }
 
 #attribution-img {
-  content: url(chrome://theme/IDR_THEME_NTP_ATTRIBUTION?$i18n{themeId});
+  content: url(chrome://theme/IDR_THEME_NTP_ATTRIBUTION?${themeId});
 }