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

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

Index: chrome/browser/resources/settings/privacy_page/privacy_page.html
diff --git a/chrome/browser/resources/settings/privacy_page/privacy_page.html b/chrome/browser/resources/settings/privacy_page/privacy_page.html
index 633bc36840101a5cdc43eb91b61e821b486494d3..0582e64e59362787a58918f4bbb3c18afe844763 100644
--- a/chrome/browser/resources/settings/privacy_page/privacy_page.html
+++ b/chrome/browser/resources/settings/privacy_page/privacy_page.html
@@ -137,8 +137,7 @@
             <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"
@@ -148,8 +147,7 @@
             <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>
@@ -157,8 +155,7 @@
             $i18n{clearBrowsingData}
             <div class="secondary">$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">