If requesting parent permission, set default dialog button to OK

The OK button in this case shows the string "Ask a Parent"

Bug: 1067061
Change-Id: I1d65bd1fd6bbede0f7544ea1c4101553b421ebd1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2132541Reviewed-by: Devlin <rdevlin.cronin@chromium.org>
Commit-Queue: Dan S <danan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#756065}

chrome/browser/ui/views/extensions/extension_install_dialog_view.cc

@@ -208,7 +208,16 @@ ExtensionInstallDialogView::ExtensionInstallDialogView(
   int buttons = prompt_->GetDialogButtons();
   DCHECK(buttons & ui::DIALOG_BUTTON_CANCEL);
 
-  DialogDelegate::SetDefaultButton(ui::DIALOG_BUTTON_CANCEL);
+  int default_button = ui::DIALOG_BUTTON_CANCEL;
+
+#if BUILDFLAG(ENABLE_SUPERVISED_USERS)
+  // When we require parent permission next, we
+  // set the default button to OK.
+  if (prompt_->requires_parent_permission())
+    default_button = ui::DIALOG_BUTTON_OK;
+#endif
+
+  DialogDelegate::SetDefaultButton(default_button);
   DialogDelegate::SetButtons(buttons);
   DialogDelegate::set_draggable(true);
   if (prompt_->has_webstore_data()) {