Add help link when Bluetooth adapter is off for WebBluetooth chooser

chrome/browser/ui/bluetooth/bluetooth_chooser_controller.h

Index: chrome/browser/ui/bluetooth/bluetooth_chooser_controller.h
diff --git a/chrome/browser/ui/bluetooth/bluetooth_chooser_controller.h b/chrome/browser/ui/bluetooth/bluetooth_chooser_controller.h
index d47d0de300ccf9b607772065905783382a550811..64cce63199a98003ba3fd6862d52e9a8cbe4f5e3 100644
--- a/chrome/browser/ui/bluetooth/bluetooth_chooser_controller.h
+++ b/chrome/browser/ui/bluetooth/bluetooth_chooser_controller.h
@@ -37,6 +37,7 @@ class BluetoothChooserController : public ChooserController {
   bool IsPaired(size_t index) const override;
   base::string16 GetOption(size_t index) const override;
   void RefreshOptions() override;
+  void OpenAdapterOffHelpUrl() const override;
   base::string16 GetStatus() const override;
   void Select(size_t index) override;
   void Cancel() override;
@@ -85,7 +86,6 @@ class BluetoothChooserController : public ChooserController {
   std::unordered_map<base::string16, int> device_name_counts_;
 
   content::BluetoothChooser::EventHandler event_handler_;
-  base::string16 no_devices_text_;
   base::string16 status_text_;
 
   DISALLOW_COPY_AND_ASSIGN(BluetoothChooserController);