[MD settings] removing secondary-button class

chrome/browser/resources/settings/privacy_page/privacy_page.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/policy/cr_policy_vars_css.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/web_ui_listener_behavior.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/neon-animation/neon-animatable.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-light.html">
@@ skipping 439 matching lines @@
           <usb-devices></usb-devices>
         </settings-subpage>
       </template>
       <template is="dom-if" route-path="/content/siteDetails" no-search>
         <settings-subpage page-title="$i18n{siteSettingsSiteDetails}">
           <site-details></site-details>
         </settings-subpage>
       </template>
       <template is="dom-if" route-path="/cookies/detail" no-search>
         <settings-subpage page-title="[[pageTitle]]">
-          <paper-button class="subpage-title-extra secondary-button"
+          <paper-button class="subpage-title-extra"
               on-tap="onRemoveAllCookiesFromSite_">
             $i18n{siteSettingsCookieRemoveAll}
           </paper-button>
           <site-data-details-subpage page-title="{{pageTitle}}">
           </site-data-details-subpage>
         </settings-subpage>
       </template>
       <template is="dom-if" route-path="/content/protectedContent" no-search>
         <settings-subpage page-title="$i18n{siteSettingsProtectedContent}">
           <div class="settings-box first">
@@ skipping 24 matching lines @@
                 category="{{ContentSettingsTypes.PROTECTED_CONTENT}}">
             </category-setting-exceptions>
           </template>
 </if>
         </settings-subpage>
       </template>
     </settings-animated-pages>
   </template>
   <script src="privacy_page.js"></script>
 </dom-module>