Migrate <cr-dialog> from PaperDialogBehavior to native <dialog>.

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

 <link rel="import" href="chrome://resources/cr_elements/icons.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/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-checkbox/paper-checkbox.html">
 <link rel="import" href="chrome://resources/cr_elements/cr_dialog/cr_dialog.html">
 <link rel="import" href="/controls/settings_checkbox.html">
 <link rel="import" href="/people_page/sync_page.html">
 <link rel="import" href="/people_page/profile_info_browser_proxy.html">
@@ skipping 266 matching lines @@
       <template is="dom-if" name="manageProfile">
         <settings-subpage page-title="$i18n{editPerson}">
           <settings-manage-profile profile-icon-url="[[profileIconUrl_]]"
               profile-name="[[profileName_]]">
           </settings-manage-profile>
         </settings-subpage>
       </template>
 </if>
     </settings-animated-pages>
 
-    <cr-dialog id="disconnectDialog">
+    <dialog is="cr-dialog" id="disconnectDialog">
       <div class="title">$i18n{syncDisconnectTitle}</div>
       <div class="body">
         <div inner-h-t-m-l="[[getDisconnectExplanationHtml_(syncStatus.domain)]]">
         </div>
   <if expr="(not chromeos and is_posix) or is_win or is_macosx">
         <paper-checkbox id="deleteProfile" hidden=[[syncStatus.domain]]>
           $i18n{syncDisconnectDeleteProfile}
         </paper-checkbox>
   </if>
       </div>
       <div class="button-container">
         <paper-button on-tap="onDisconnectCancel_" class="cancel-button">
           $i18n{cancel}
         </paper-button>
         <paper-button id="disconnectConfirm" class="action-button"
             hidden=[[syncStatus.domain]] on-tap="onDisconnectConfirm_">
           $i18n{syncDisconnect}
         </paper-button>
         <paper-button id="disconnectManagedProfileConfirm" class="action-button"
             hidden=[[!syncStatus.domain]] on-tap="onDisconnectConfirm_">
           $i18n{syncDisconnectConfirm}
         </paper-button>
       </div>
-    </cr-dialog>
+    </dialog>
 
 <if expr="chromeos">
     <template is="dom-if" if="[[easyUnlockEnabled_]]">
       <easy-unlock-turn-off-dialog id="easyUnlockTurnOffDialog">
       </easy-unlock-turn-off-dialog>
     </template>
 </if>
   </template>
   <script src="people_page.js"></script>
 </dom-module>