chrome.gcdPrivate allows app to choose pairing method.

chrome/browser/ui/webui/local_discovery/local_discovery_ui_handler.cc

 // Copyright 2013 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/ui/webui/local_discovery/local_discovery_ui_handler.h"
 
 #include <set>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 374 matching lines @@
     const CredentialsCallback& callback) {
   callback.Run("", "");
 }
 
 void LocalDiscoveryUIHandler::SwitchToSetupWiFi(
     const ResultCallback& callback) {
   callback.Run(true);
 }
 
 void LocalDiscoveryUIHandler::ConfirmSecurityCode(
-    const std::string& confirmation_code,
     const ResultCallback& callback) {
   device_code_callback_ = callback;
   web_ui()->CallJavascriptFunction(
       "local_discovery.onRegistrationConfirmDeviceCode",
-      base::StringValue(confirmation_code));
+      base::StringValue("1234"));
 }
 
 void LocalDiscoveryUIHandler::RestoreWifi(const ResultCallback& callback) {
   callback.Run(true);
 }
 
 void LocalDiscoveryUIHandler::OnSetupDone() {
   std::string service_name = current_setup_operation_->service_name();
   current_setup_operation_.reset();
   current_register_operation_.reset();
@@ skipping 379 matching lines @@
     scoped_ptr<base::Value> null_value(base::Value::CreateNullValue());
 
     web_ui()->CallJavascriptFunction(
         "local_discovery.onUnregisteredDeviceUpdate", service_key, *null_value);
   }
 }
 
 #endif  // ENABLE_WIFI_BOOTSTRAPPING
 
 }  // namespace local_discovery