MD Settings: Improve People Page Manage Profile button accessibility

chrome/browser/resources/settings/people_page/people_page.html

 <link rel="import" href="chrome://resources/cr_elements/cr_dialog/cr_dialog.html">
 <link rel="import" href="chrome://resources/cr_elements/cr_expand_button/cr_expand_button.html">
 <link rel="import" href="chrome://resources/cr_elements/icons.html">
 <link rel="import" href="chrome://resources/html/i18n_behavior.html">
 <link rel="import" href="chrome://resources/html/icon.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-collapse/iron-collapse.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">
@@ skipping 105 matching lines @@
 <if expr="not chromeos">
             <div class="middle two-line no-min-width"
                 on-tap="onProfileNameTap_" actionable>
 </if>
 <if expr="chromeos">
             <div class="middle two-line no-min-width" on-tap="onPictureTap_"
                 actionable>
 </if>
               <div class="flex text-elide">
                 <span id="profile-name">[[profileName_]]</span>
-                <div class="secondary" hidden="[[!syncStatus.signedIn]]"
-                    id="profileNameSecondary">
+                <div class="secondary" hidden="[[!syncStatus.signedIn]]">
                   [[syncStatus.signedInUsername]]
                 </div>
               </div>
+<if expr="not chromeos">
               <button class="subpage-arrow" is="paper-icon-button-light"
-                  aria-labelledby="profile-name"
-                  aria-describedby="profileNameSecondary"></button>
+                  aria-label="$i18n{editPerson}"
+                  aria-describedby="profile-name"></button>
+</if>
+<if expr="chromeos">
+              <button class="subpage-arrow" is="paper-icon-button-light"
+                  aria-label="$i18n{changePictureTitle}"
+                  aria-describedby="profile-name"></button>
+</if>
             </div>
 <if expr="not chromeos">
             <template is="dom-if" if="[[showSignin_(syncStatus)]]">
               <span class="secondary-action">
                 <paper-button class="primary-button" on-tap="onSigninTap_"
                     disabled="[[syncStatus.setupInProgress]]">
                   $i18n{syncSignin}
                 </paper-button>
               </span>
             </template>
@@ skipping 273 matching lines @@
 <if expr="chromeos">
     <template is="dom-if" if="[[showEasyUnlockTurnOffDialog_]]">
       <easy-unlock-turn-off-dialog id="easyUnlockTurnOffDialog"
           on-close="onEasyUnlockTurnOffDialogClose_">
       </easy-unlock-turn-off-dialog>
     </template>
 </if>
   </template>
   <script src="people_page.js"></script>
 </dom-module>