Add a method to query IPP printers for attributes.

chrome/browser/chromeos/printing/printer_info_stub.cc

+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chrome/browser/chromeos/printing/printer_info.h"
+
+#include "base/logging.h"
+#include "base/task_scheduler/post_task.h"
+
+namespace chromeos {
+
+void QueryIppPrinter(const std::string& host,
+                     const int port,
+                     const std::string& path,
+                     const PrinterInfoCallback& callback) {
+  DCHECK(!host.empty());
+
+  base::PostTask(FROM_HERE, base::Bind(callback, false, "Foo", "Bar", false));
+}
+
+}  // namespace chromeos