Avoid NOTREACHED in content settings bubble.

chrome/browser/ui/views/content_setting_bubble_contents.cc

 // Copyright (c) 2012 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/ui/views/content_setting_bubble_contents.h"
 
 #include <algorithm>
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 306 matching lines @@
 
       combobox_models_.emplace_back(i->first);
       MediaComboboxModel* model = &combobox_models_.back();
       views::Combobox* combobox = new views::Combobox(model);
       // Disable the device selection when the website is managing the devices
       // itself or if there are no devices present.
       combobox->SetEnabled(
           !(i->second.disabled || model->GetDevices().empty()));
       combobox->set_listener(this);
       combobox->SetSelectedIndex(
-          model->GetDeviceIndex(i->second.selected_device));
+          model->GetDevices().empty()
+              ? 0
+              : model->GetDeviceIndex(i->second.selected_device));
       layout->AddView(combobox);
 
       bubble_content_empty = false;
     }
   }
 
   const gfx::FontList& domain_font =
       ui::ResourceBundle::GetSharedInstance().GetFontList(
           ui::ResourceBundle::BoldFont);
   for (std::vector<ContentSettingBubbleModel::DomainList>::const_iterator i(
@@ skipping 95 matching lines @@
   DCHECK(i != list_item_links_.end());
   content_setting_bubble_model_->OnListItemClicked(i->second);
 }
 
 void ContentSettingBubbleContents::OnPerformAction(views::Combobox* combobox) {
   MediaComboboxModel* model =
       static_cast<MediaComboboxModel*>(combobox->model());
   content_setting_bubble_model_->OnMediaMenuClicked(
       model->type(), model->GetDevices()[combobox->selected_index()].id);
 }