MD Settings: Convert reset_page/ to use browser proxy pattern.

chrome/browser/resources/settings/reset_page/powerwash_dialog.js

Index: chrome/browser/resources/settings/reset_page/powerwash_dialog.js
diff --git a/chrome/browser/resources/settings/reset_page/powerwash_dialog.js b/chrome/browser/resources/settings/reset_page/powerwash_dialog.js
index f91c245f6779122c5c951e90361e2952d86a5ede..848f0b19a01c91192d003ee27f34ed4a62a04eae 100644
--- a/chrome/browser/resources/settings/reset_page/powerwash_dialog.js
+++ b/chrome/browser/resources/settings/reset_page/powerwash_dialog.js
@@ -11,7 +11,7 @@ Polymer({
   is: 'settings-powerwash-dialog',
 
   open: function() {
-    chrome.send('onPowerwashDialogShow');
+    settings.ResetBrowserProxyImpl.getInstance().onPowerwashDialogShow();
     this.$.dialog.open();
   },
 
@@ -22,6 +22,6 @@ Polymer({
 
   /** @private */
   onRestartTap_: function() {
-    chrome.send('requestFactoryResetRestart');
+    settings.ResetBrowserProxyImpl.getInstance().requestFactoryResetRestart();
   },
 });