MD Settings: convert paper-icon-button to paper-icon-button-light.

chrome/browser/resources/settings/languages_page/edit_dictionary_page.html

 <link rel="import" href="chrome://resources/html/polymer.html">
 
 <link rel="import" href="chrome://resources/cr_elements/icons.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-list/iron-list.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-button/paper-button.html">
-<link rel="import" href="chrome://resources/polymer/v1_0/paper-icon-button/paper-icon-button.html">
+<link rel="import" href="chrome://resources/polymer/v1_0/paper-icon-button/paper-icon-button-light.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-input/paper-input.html">
 <link rel="import" href="../global_scroll_target_behavior.html">
 <link rel="import" href="../prefs/prefs.html">
 <link rel="import" href="../prefs/prefs_behavior.html">
 <link rel="import" href="../settings_shared_css.html">
 
 <dom-module id="settings-edit-dictionary-page">
   <template>
     <style include="settings-shared">
       :host {
@@ skipping 28 matching lines @@
     <div class="settings-box continuation block">
       <h2>$i18n{customDictionaryWords}</h2>
     </div>
     <div class="list-frame">
       <template is="dom-if" if="[[hasWords_(words_.length)]]">
         <iron-list id="list" items="[[words_]]"
             scroll-target="[[subpageScrollTarget]]">
           <template>
             <div class="list-item">
               <div class="word text-elide">[[item]]</div>
-              <paper-icon-button icon="cr:clear" on-tap="onRemoveWordTap_"
-                  tabindex$="[[tabIndex]]">
-              </paper-icon-button>
+              <button is="paper-icon-button-light" class="icon-clear"
+                  on-tap="onRemoveWordTap_" tabindex$="[[tabIndex]]">
+              </button>
             </div>
           </template>
         </iron-list>
       </template>
       <template is="dom-if" if="[[!hasWords_(words_.length)]]">
         <div id="noWordsLabel" class="list-item">
           $i18n{noCustomDictionaryWordsFound}
         </div>
       </template>
     </div>
   </template>
   <script src="edit_dictionary_page.js"></script>
 </dom-module>