MD Settings: Migrate from paper-drawer-panel to app-drawer.

chrome/browser/resources/settings/settings_ui/settings_ui.js

Index: chrome/browser/resources/settings/settings_ui/settings_ui.js
diff --git a/chrome/browser/resources/settings/settings_ui/settings_ui.js b/chrome/browser/resources/settings/settings_ui/settings_ui.js
index f963adaa2ab6d45e5fed845944a5a9269c47c1ba..a6b1008786877c440740f457859cfd2ace456965 100644
--- a/chrome/browser/resources/settings/settings_ui/settings_ui.js
+++ b/chrome/browser/resources/settings/settings_ui/settings_ui.js
@@ -33,11 +33,17 @@ Polymer({
 
   /** @private */
   onIronActivate_: function() {
-    this.$.panel.closeDrawer();
+    this.$$('app-drawer').close();
+  },
+
+  /** @private */
+  onMenuButtonTap_: function() {
+    this.$$('app-drawer').toggle();
   },
 
   /** @private */
   directionDelegateChanged_: function() {
-    this.$.panel.rightDrawer = this.directionDelegate.isRtl();
+    this.$$('app-drawer').align = this.directionDelegate.isRtl() ?
+        'right' : 'left';
   },
 });