[MD settings] use arrow-forward to switch direction in rtl

chrome/browser/resources/settings/privacy_page/privacy_page.html

 <link rel="import" href="chrome://resources/cr_elements/policy/cr_policy_vars_css.html">
 <link rel="import" href="chrome://resources/html/polymer.html">
 <link rel="import" href="chrome://resources/html/web_ui_listener_behavior.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-flex-layout/iron-flex-layout-classes.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-icon-button/paper-icon-button-light.html">
 <link rel="import" href="/clear_browsing_data_dialog/clear_browsing_data_dialog.html">
 <link rel="import" href="/controls/settings_checkbox.html">
 <link rel="import" href="/route.html">
 <link rel="import" href="/settings_page/settings_animated_pages.html">
@@ skipping 119 matching lines @@
           </paper-toggle-button>
         </div>
 </if>
 <if expr="use_nss_certs or is_win or is_macosx">
         <div id="manageCertificates" class="settings-box two-line"
             actionable on-tap="onManageCertificatesTap_">
           <div class="start">
             <div>$i18n{manageCertificates}</div>
             <div class="secondary">$i18n{manageCertificatesDescription}</div>
           </div>
-          <button class="icon-arrow-right" is="paper-icon-button-light">
-          </button>
+          <button class="subpage-arrow" is="paper-icon-button-light"></button>
         </div>
 </if>
         <div id="site-settings-subpage-trigger"
             class="settings-box two-line" actionable
             on-tap="onSiteSettingsTap_">
           <div class="start">
             <div>$i18n{siteSettings}</div>
             <div class="secondary">$i18n{siteSettingsDescription}</div>
           </div>
-          <button class="icon-arrow-right" is="paper-icon-button-light">
-          </button>
+          <button class="subpage-arrow" is="paper-icon-button-light"></button>
         </div>
         <div class="settings-box two-line" id="clearBrowsingData"
             on-tap="onClearBrowsingDataTap_" actionable>
           <div class="start">
             $i18n{clearBrowsingData}
             <div class="secondary">$i18n{clearBrowsingDataDescription}</div>
           </div>
-          <button class="icon-arrow-right" is="paper-icon-button-light">
-          </button>
+          <button class="subpage-arrow" is="paper-icon-button-light"></button>
         </div>
       </neon-animatable>
 <if expr="use_nss_certs">
       <template is="dom-if" route-path="/certificates">
         <settings-subpage
             associated-control="[[$$('#manageCertificates')]]"
             page-title="$i18n{manageCertificates}">
           <settings-certificate-manager-page>
           </settings-certificate-manager-page>
         </settings-subpage>
@@ skipping 148 matching lines @@
       </template>
       <template is="dom-if" route-path="/siteSettings/siteDetails" no-search>
         <settings-subpage page-title="$i18n{siteSettingsSiteDetails}">
           <site-details site="[[selectedSite]]"></site-details>
         </settings-subpage>
       </template>
     </settings-animated-pages>
   </template>
   <script src="privacy_page.js"></script>
 </dom-module>