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

chrome/browser/resources/settings/a11y_page/manage_a11y_page.html

 <link rel="import" href="chrome://resources/html/polymer.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-icon-button/paper-icon-button-light.html">
 <link rel="import" href="/controls/settings_checkbox.html">
 <link rel="import" href="/i18n_setup.html">
 <link rel="import" href="/route.html">
 <link rel="import" href="/settings_shared_css.html">
 <link rel="import" href="/settings_vars_css.html">
 
 <dom-module id="settings-manage-a11y-page">
   <template>
@@ skipping 118 matching lines @@
         <settings-checkbox pref="{{prefs.settings.a11y.cursor_highlight}}"
             label="$i18n{cursorHighlightLabel}">
         </settings-checkbox>
       </div>
       <div class="settings-box two-line indented" on-tap="onMouseTap_"
           actionable>
         <iron-icon icon="settings:mouse"></iron-icon>
         <div class="middle">
           <div>$i18n{mouseSettingsTitle}</div>
           <div class="secondary">$i18n{mouseSettingsDescription}</div>
-          <button class="icon-arrow-right" is="paper-icon-button-light">
-          </button>
+          <button class="subpage-arrow" is="paper-icon-button-light"></button>
         </div>
       </div>
 
       <h2>$i18n{audioHeading}</h2>
       <div class="settings-box block first indented">
         <settings-checkbox pref="{{prefs.settings.a11y.mono_audio}}"
             label="$i18n{monoAudioLabel}">
         </settings-checkbox>
       </div>
     </div>
 
     <div class="settings-box two-line" on-tap="onMoreFeaturesTap_" actionable>
       <div class="start">
         <div>$i18n{additionalFeaturesTitle}</div>
         <div class="secondary">$i18n{a11yWebStore}</div>
       </div>
       <button class="icon-external" is="paper-icon-button-light"></button>
     </div>
   </template>
   <script src="manage_a11y_page.js"></script>
 </dom-module>