Make getBluetoothManualChooserEvents() asynchronous.

components/html_viewer/web_test_delegate_impl.cc

 // Copyright 2015 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 "components/html_viewer/web_test_delegate_impl.h"
 
 #include <iostream>
 
 #include "base/time/time.h"
 #include "cc/layers/texture_layer.h"
@@ skipping 183 matching lines @@
 }
 
 void WebTestDelegateImpl::SetBluetoothMockDataSet(const std::string& data_set) {
   NOTIMPLEMENTED();
 }
 
 void WebTestDelegateImpl::SetBluetoothManualChooser() {
   NOTIMPLEMENTED();
 }
 
-std::vector<std::string>
-WebTestDelegateImpl::GetBluetoothManualChooserEvents() {
+void WebTestDelegateImpl::GetBluetoothManualChooserEvents(
+    const base::Callback<void(const std::vector<std::string>&)>& callback) {
   NOTIMPLEMENTED();
-  return std::vector<std::string>();
 }
 
 void WebTestDelegateImpl::SendBluetoothManualChooserEvent(
     const std::string& event,
     const std::string& argument) {
   NOTIMPLEMENTED();
 }
 
 void WebTestDelegateImpl::SetGeofencingMockProvider(bool service_available) {
   NOTIMPLEMENTED();
@@ skipping 115 matching lines @@
     const blink::WebPluginParams& params) {
   NOTIMPLEMENTED();
   return nullptr;
 }
 
 void WebTestDelegateImpl::OnWebTestProxyBaseDestroy(
     test_runner::WebTestProxyBase* base) {
 }
 
 }  // namespace html_viewer