Revert of [i18n] chromeos login i18n-content to $i18n{}

chrome/browser/resources/chromeos/login/oobe_buttons.html

Index: chrome/browser/resources/chromeos/login/oobe_buttons.html
diff --git a/chrome/browser/resources/chromeos/login/oobe_buttons.html b/chrome/browser/resources/chromeos/login/oobe_buttons.html
index 31d426b2a950e8b5b1259e6b32cd99ac58e3de22..f3d0e7b832df5d42b08bf2aad1bdcf8d010fff66 100644
--- a/chrome/browser/resources/chromeos/login/oobe_buttons.html
+++ b/chrome/browser/resources/chromeos/login/oobe_buttons.html
@@ -31,7 +31,7 @@
 
   Example:
     <oobe-icon-button inverse>
-      <div>OK</div>
+      <div i18n-content="oobeOKButtonText"></div>
     </oobe-icon-button>
 
   Attributes:
@@ -71,7 +71,7 @@
         aria-label$="[[ariaLabel]]">
       <div class="flex horizontal layout start center">
         <iron-icon icon="oobe-buttons:arrow-back"></iron-icon>
-        <div id="text">$i18n{back}</div>
+        <div id="text" i18n-content="back"></div>
       </div>
     </paper-button>
   </template>
@@ -82,7 +82,7 @@
   <template>
     <paper-button id="button" on-tap="onClick_" disabled="[[disabled]]">
       <div class="flex horizontal layout start center">
-        <div id="text">$i18n{next}</div>
+        <div id="text" i18n-content="next"></div>
         <iron-icon icon="oobe-buttons:arrow-forward"></iron-icon>
       </div>
     </paper-button>
@@ -94,7 +94,7 @@
 
   Example:
     <oobe-welcome-secondary-button icon="close">
-      <div>i18n version of oobeCloseButtonText</div>
+      <div i18n-content="oobeCloseButtonText"></div>
     </oobe-welcome-secondary-button>
 
   Attributes: