Add throbber and status text to WebBluetooth chooser UI on non-Mac desktops

chrome/browser/usb/usb_chooser_controller.cc

Index: chrome/browser/usb/usb_chooser_controller.cc
diff --git a/chrome/browser/usb/usb_chooser_controller.cc b/chrome/browser/usb/usb_chooser_controller.cc
index 52c64d23e2d8cd806c0c4579495924b88b3b5d53..23ed71607b5fb3d3d851b7433882840a8c49fa0c 100644
--- a/chrome/browser/usb/usb_chooser_controller.cc
+++ b/chrome/browser/usb/usb_chooser_controller.cc
@@ -93,6 +93,16 @@ base::string16 UsbChooserController::GetOption(size_t index) const {
                    devices_[index].first->serial_number());
 }
 
+void UsbChooserController::RefreshOptions() {}
+
+bool UsbChooserController::NeedsThrobber() const {
+  return false;
+}
+
+bool UsbChooserController::NeedsStatus() const {
+  return false;
+}
+
 void UsbChooserController::Select(size_t index) {
   DCHECK_LT(index, devices_.size());
   content::WebContents* web_contents =