[MD settings] removing secondary-button class

chrome/browser/resources/settings/site_settings/site_data.html

 <link rel="import" href="chrome://resources/html/assert.html">
 <link rel="import" href="chrome://resources/html/cr/ui/focus_without_ink.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/cr_elements/cr_dialog/cr_dialog.html">
 <link rel="import" href="chrome://resources/cr_elements/icons.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-icon/iron-icon.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-icon-button/paper-icon-button-light.html">
 <link rel="import" href="../settings_page/settings_subpage_search.html">
 <link rel="import" href="../settings_shared_css.html">
@@ skipping 21 matching lines @@
     </style>
     <div class="settings-box first subtitle-row">
       <div class="start">
         <h2>$i18n{siteSettingsCookieHeader}</h2>
       </div>
       <settings-subpage-search id="filter" on-search-changed="onSearchChanged_"
           label="$i18n{siteSettingsCookieSearch}">
       </settings-subpage-search>
     </div>
     <div class="settings-box continuation">
-      <paper-button class="secondary-button" id="removeShowingSites"
-          on-tap="onRemoveShowingSitesTap_"
+      <paper-button id="removeShowingSites" on-tap="onRemoveShowingSitesTap_"
           hidden$="[[!isRemoveButtonVisible_(sites, renderedItemCount)]]">
         [[computeRemoveLabel_(filterString_)]]
       </paper-button>
     </div>
     <div class="list-frame vertical-list">
       <template is="dom-repeat" id="list" items="[[sites]]" filter="showItem_"
           rendered-item-count="{{renderedItemCount::dom-change}}"
           notify-dom-change>
         <div class="list-item two-line" on-tap="onSiteTap_" actionable>
           <div class="favicon-image" style$="[[computeSiteIcon(item.site)]]">
@@ skipping 27 matching lines @@
         <paper-button class="action-button" on-tap="onConfirmDelete_">
           $i18n{siteSettingsCookiesClearAll}
         </paper-button>
       </div>
     </dialog>
   </template>
   <script src="cookie_info.js"></script>
   <script src="cookie_tree_node.js"></script>
   <script src="site_data.js"></script>
 </dom-module>