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

chrome/browser/resources/settings/search_engines_page/search_engine_entry.html

 <link rel="import" href="chrome://resources/cr_elements/cr_action_menu/cr_action_menu.html">
 <link rel="import" href="chrome://resources/cr_elements/icons.html">
 <link rel="import" href="chrome://resources/html/polymer.html">
 <link rel="import" href="chrome://resources/html/icon.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="../controls/extension_controlled_indicator.html">
 <link rel="import" href="../focus_row_behavior.html">
 <link rel="import" href="search_engine_dialog.html">
 <link rel="import" href="search_engine_entry_css.html">
 <link rel="import" href="search_engines_browser_proxy.html">
 <link rel="import" href="../settings_shared_css.html">
 
 <dom-module id="settings-search-engine-entry">
   <template>
     <style include="settings-shared search-engine-entry">
@@ skipping 31 matching lines @@
       </settings-search-engine-dialog>
     </template>
     <div class="list-item" focus-row-container>
       <div id="name-column">
         <div class="favicon-image"
             style="background-image: [[getIconSet_(engine.iconURL)]]"></div>
         <div>[[engine.displayName]]</div>
       </div>
       <div id="keyword-column">[[engine.keyword]]</div>
       <div id="url-column" class="text-elide">[[engine.url]]</div>
-      <paper-icon-button icon="cr:more-vert" on-tap="onDotsTap_"
-          title="$i18n{moreActions}" focus-row-control
+      <button is="paper-icon-button-light" class="icon-more-vert"
+          on-tap="onDotsTap_" title="$i18n{moreActions}" focus-row-control
           focus-type="cr-menu-button">
-      </paper-icon-button>
+      </button>
       <dialog is="cr-action-menu">
         <button class="dropdown-item" role="option" on-tap="onMakeDefaultTap_"
             hidden$="[[!engine.canBeDefault]]" id="makeDefault">
           $i18n{searchEnginesMakeDefault}
         </button>
         <button class="dropdown-item" role="option" on-tap="onEditTap_"
             hidden$="[[!engine.canBeEdited]]"
             id="edit">$i18n{edit}</button>
         <button class="dropdown-item" role="option" on-tap="onDeleteTap_"
             hidden$="[[!engine.canBeRemoved]]"
             id="delete">$i18n{searchEnginesRemoveFromList}</button>
       </dialog>
     </div>
     <template is="dom-if" if="[[engine.extension]]">
       <extension-controlled-indicator
           extension-id="[[engine.extension.id]]"
           extension-name="[[engine.extension.name]]"
           extension-can-be-disabled="[[engine.extension.canBeDisabled]]">
       </extension-controlled-indicator>
     </template>
   </template>
   <script src="search_engine_entry.js"></script>
 </dom-module>