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

chrome/browser/usb/usb_chooser_controller.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 "chrome/browser/usb/usb_chooser_controller.h"
 
 #include <stddef.h>
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 75 matching lines @@
   const base::string16& device_name = devices_[index].second;
   const auto& it = device_name_map_.find(device_name);
   DCHECK(it != device_name_map_.end());
   return it->second == 1
              ? device_name
              : l10n_util::GetStringFUTF16(
                    IDS_DEVICE_CHOOSER_DEVICE_NAME_WITH_ID, device_name,
                    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 =
       content::WebContents::FromRenderFrameHost(render_frame_host_);
   GURL embedding_origin =
       web_contents->GetMainFrame()->GetLastCommittedURL().GetOrigin();
   Profile* profile =
       Profile::FromBrowserContext(web_contents->GetBrowserContext());
   UsbChooserContext* chooser_context =
       UsbChooserContextFactory::GetForProfile(profile);
@@ skipping 71 matching lines @@
 
 bool UsbChooserController::DisplayDevice(
     scoped_refptr<device::UsbDevice> device) const {
   return device::UsbDeviceFilter::MatchesAny(device, filters_) &&
          (base::CommandLine::ForCurrentProcess()->HasSwitch(
               switches::kDisableWebUsbSecurity) ||
           device::FindInWebUsbAllowedOrigins(
               device->webusb_allowed_origins(),
               render_frame_host_->GetLastCommittedURL().GetOrigin()));
 }