[MD settings] change i18n() use in html to $i18n

chrome/browser/resources/settings/people_page/change_picture.html

 <link rel="import" href="chrome://resources/html/i18n_behavior.html">
 <link rel="import" href="chrome://resources/html/polymer.html">
 <link rel="import" href="chrome://resources/html/util.html">
 <link rel="import" href="chrome://resources/html/web_ui_listener_behavior.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-a11y-keys/iron-a11y-keys.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-selector/iron-selector.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-icon-button/paper-icon-button.html">
 <link rel="import" href="chrome://md-settings/i18n_setup.html">
 <link rel="import" href="chrome://md-settings/icons.html">
 <link rel="import" href="chrome://md-settings/people_page/camera.html">
@@ skipping 25 matching lines @@
           <img id="oldImage" data-type$="[[selectionTypesEnum_.OLD]]"
               src="[[oldImageUrl_]]" hidden="[[!oldImageUrl_]]">
           <template is="dom-repeat" items="[[defaultImages_]]">
             <img data-type$="[[selectionTypesEnum_.DEFAULT]]"
                 data-default-image-index$="[[index]]" src="[[item.url]]"
                 alt="[[item.title]]">
           </template>
         </iron-selector>
         <template is="dom-if" if="[[isAuthorCreditShown_(selectedItem_)]]">
           <div id="authorCredit">
-            [[i18n('authorCredit')]]
+            $i18n{authorCredit}
             [[getAuthorName_(selectedItem_, defaultImages_)]]
             <a href="[[getAuthorWebsite_(selectedItem_, defaultImages_)]]"
                 target="_blank">
               [[getAuthorWebsite_(selectedItem_, defaultImages_)]]
             </a>
           </div>
         </template>
       </div>
       <div id="previewPane">
         <img alt="$i18n{previewAltText}" src="[[selectedItem_.src]]"
             hidden="[[isPreviewImageHidden_(selectedItem_)]]">
         <div id="discardControlBar"
             hidden="[[isDiscardHidden_(selectedItem_)]]">
           <paper-icon-button id="discardOldImage" tabindex="0"
               icon="settings:delete" title="$i18n{discardPhoto}"
               on-tap="onTapDiscardOldImage_">
           </paper-icon-button>
         </div>
         <settings-camera id="camera"
             camera-active="[[isCameraActive_(cameraPresent_, selectedItem_)]]"
             on-phototaken="onPhotoTaken_">
       </div>
     </div>
   </template>
   <script src="change_picture.js"></script>
 </dom-module>