Add help link when Bluetooth adapter is off for WebBluetooth chooser

chrome/browser/chooser_controller/chooser_controller.cc

 // Copyright 2016 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/chooser_controller/chooser_controller.h"
 
+#include "base/logging.h"
 #include "base/strings/utf_string_conversions.h"
 #include "components/url_formatter/elide_url.h"
 #include "content/public/browser/render_frame_host.h"
 #include "content/public/browser/web_contents.h"
 #include "extensions/browser/extension_registry.h"
 #include "extensions/common/constants.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "url/origin.h"
 
 ChooserController::ChooserController(content::RenderFrameHost* owner,
@@ skipping 42 matching lines @@
   return -1;
 }
 
 bool ChooserController::IsConnected(size_t index) const {
   return false;
 }
 
 bool ChooserController::IsPaired(size_t index) const {
   return false;
 }
+
+void ChooserController::OpenAdapterOffHelpUrl() const {
+  NOTREACHED();
+}