MD Settings: Privacy: Show dialog when changing do-not-track

chrome/browser/resources/settings/privacy_page/privacy_page.js

Index: chrome/browser/resources/settings/privacy_page/privacy_page.js
diff --git a/chrome/browser/resources/settings/privacy_page/privacy_page.js b/chrome/browser/resources/settings/privacy_page/privacy_page.js
index 825633f929ffc159ac677f3a70cc9916a6b7c954..664cc2aa5beb031531f9e1406c0af150c2c6688f 100644
--- a/chrome/browser/resources/settings/privacy_page/privacy_page.js
+++ b/chrome/browser/resources/settings/privacy_page/privacy_page.js
@@ -111,6 +111,37 @@ Polymer({
         settings.getCurrentRoute() == settings.Route.CLEAR_BROWSER_DATA;
   },
 
+  /**
+   * Handles the change event for the do-not-track toggle. Shows a
+   * confirmation dialog.
+   * @param {Event} event
+   * @private
+   */
+  onDoNotTrackChange_: function(event) {
+    this.$.confirmDoNotTrackDialog.showModal();
+  },
+
+  /**
+   * Handles the shared proxy confirmation dialog 'Confirm' button.
+   * @private
+   */
+  onDoNotTrackDialogConfirm_: function() {
+    /** @type {!SettingsToggleButtonElement} */ (this.$.doNotTrack)
+        .sendPrefChange();
+    this.$.confirmDoNotTrackDialog.close();
+  },
+
+  /**
+   * Handles the shared proxy confirmation dialog 'Cancel' button or a cancel
+   * event.
+   * @private
+   */
+  onDoNotTrackDialogCancel_: function() {
+    /** @type {!SettingsToggleButtonElement} */ (this.$.doNotTrack)
+        .resetToPrefValue();
+    this.$.confirmDoNotTrackDialog.close();
+  },
+
   /** @private */
   onManageCertificatesTap_: function() {
 // <if expr="use_nss_certs">