Print Preview: Remove workaround for blink bug

crbug.com/804047 has been fixed, and the DCHECK referenced in the
Print Preview JS no longer occurs. Remove the async(..., 1) workaround.

Bug: None
Change-Id: I0a8f38a697965e912265092d33ef7a2d0e58f85f
Reviewed-on: https://chromium-review.googlesource.com/c/1281912Reviewed-by: Demetrios Papadopoulos <dpapad@chromium.org>
Commit-Queue: Rebekah Potter <rbpotter@chromium.org>
Cr-Commit-Position: refs/heads/master@{#600146}

chrome/browser/resources/print_preview/new/advanced_settings_dialog.js

@@ -42,12 +42,7 @@ Polymer({
   attached: function() {
     this.metrics_.record(print_preview.Metrics.PrintSettingsUiBucket
                              .ADVANCED_SETTINGS_DIALOG_SHOWN);
-    // This async() call is a workaround to prevent a DCHECK - see
-    // https://crbug.com/804047.
-    // TODO(rbpotter): Remove after Polymer2 migration is complete.
-    this.async(() => {
     this.$.dialog.showModal();
-    }, 1);
   },
 
   /**

chrome/browser/resources/print_preview/new/destination_settings.js

@@ -87,12 +87,7 @@ Polymer({
     this.destinationStore.startLoadAllDestinations();
     this.invitationStore.startLoadingInvitations();
     const dialog = this.$.destinationDialog.get();
-    // This async() call is a workaround to prevent a DCHECK - see
-    // https://crbug.com/804047.
-    // TODO(rbpotter): Remove after Polymer2 migration is complete.
-    this.async(() => {
     dialog.show();
-    }, 1);
   },
 
   showCloudPrintPromo: function() {

chrome/test/data/webui/print_preview/advanced_dialog_test.js

@@ -61,7 +61,7 @@ cr.define('advanced_dialog_test', function() {
       dialog.destination = destination;
 
       document.body.appendChild(dialog);
-      return test_util.eventToPromise('cr-dialog-open', dialog);
+      Polymer.dom.flush();
     }
 
     /**
@@ -99,20 +99,21 @@ cr.define('advanced_dialog_test', function() {
     // Tests that the search box does not appear when there is only one option,
     // and that the vendor item is correctly displayed.
     test(assert(TestNames.AdvancedSettings1Option), function() {
-      return setupDialog(1).then(() => verifyListWithItemCount(1));
+      setupDialog(1);
+      verifyListWithItemCount(1);
     });
 
     // Tests that the search box appears when there are two options, and that
     // the items are correctly displayed.
     test(assert(TestNames.AdvancedSettings2Options), function() {
-      return setupDialog(2).then(() => verifyListWithItemCount(2));
+      setupDialog(2);
+      verifyListWithItemCount(2);
     });
 
     // Tests that the advanced settings dialog correctly updates the settings
     // value for vendor items when the apply button is clicked.
     test(assert(TestNames.AdvancedSettingsApply), function() {
-      return setupDialog(3)
-          .then(() => {
+      setupDialog(3);
       setItemValues();
 
       const buttons = dialog.shadowRoot.querySelectorAll('paper-button');
@@ -121,9 +122,7 @@ cr.define('advanced_dialog_test', function() {
 
       // Click apply button.
       buttons[1].click();
-            return whenDialogClose;
-          })
-          .then(() => {
+      return whenDialogClose.then(() => {
         // Check that the setting has been set.
         const setting = dialog.getSettingValue('vendorItems');
         assertEquals(6, setting.printArea);
@@ -135,8 +134,7 @@ cr.define('advanced_dialog_test', function() {
     // Tests that the advanced settings dialog does not update the settings
     // value for vendor items when the close button is clicked.
     test(assert(TestNames.AdvancedSettingsClose), function() {
-      return setupDialog(3)
-          .then(() => {
+      setupDialog(3);
       setItemValues();
 
       const buttons = dialog.shadowRoot.querySelectorAll('paper-button');
@@ -145,9 +143,7 @@ cr.define('advanced_dialog_test', function() {
 
       // Click close button.
       buttons[0].click();
-            return whenDialogClose;
-          })
-          .then(() => {
+      return whenDialogClose.then(() => {
         // Check that the setting has not been set.
         const setting = dialog.getSettingValue('vendorItems');
         assertEquals(undefined, setting.printArea);
@@ -159,7 +155,7 @@ cr.define('advanced_dialog_test', function() {
     // Tests that the dialog correctly shows and hides settings based on the
     // value of the search query.
     test(assert(TestNames.AdvancedSettingsFilter), function() {
-      return setupDialog(3).then(() => {
+      setupDialog(3);
       const searchBox = dialog.$.searchBox;
       const items = dialog.shadowRoot.querySelectorAll(
           'print-preview-advanced-settings-item');
@@ -187,7 +183,6 @@ cr.define('advanced_dialog_test', function() {
       assertFalse(noMatchHint.hidden);
     });
   });
-  });
 
   return {
     suiteName: suiteName,