Chooser spinner should disappear as soon as one device shows up

chrome/browser/chooser_controller/mock_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/mock_chooser_controller.h"
 
 #include "base/logging.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/grit/generated_resources.h"
 #include "ui/base/l10n/l10n_util.h"
@@ skipping 71 matching lines @@
       if (view()) {
         view()->OnRefreshStateChanged(
             false /* Refreshing options is complete */);
       }
       break;
   }
 }
 
 void MockChooserController::OptionAdded(const base::string16 option_name) {
   option_names_.push_back(option_name);
-  if (view())
+  if (view()) {
     view()->OnOptionAdded(option_names_.size() - 1);
+    if (option_names_.size() == 1)
+      view()->OnOptionAvailableDuringRefresh();
+  }
 }
 
 void MockChooserController::OptionRemoved(const base::string16 option_name) {
   for (auto it = option_names_.begin(); it != option_names_.end(); ++it) {
     if (*it == option_name) {
       size_t index = it - option_names_.begin();
       option_names_.erase(it);
       if (view())
         view()->OnOptionRemoved(index);
       return;
     }
   }
 }
 
 void MockChooserController::ClearAllOptions() {
   option_names_.clear();
 }