Show camera and microphone status indicators.

chrome/browser/status_icons/desktop_notification_balloon.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/status_icons/desktop_notification_balloon.h"
 
 #include "base/bind.h"
 #include "base/string_number_conversions.h"
 #include "base/threading/thread_restrictions.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/notifications/desktop_notification_service.h"
 #include "chrome/browser/notifications/notification.h"
 #include "chrome/browser/notifications/notification_delegate.h"
 #include "chrome/browser/notifications/notification_ui_manager.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/browser/ui/webui/web_ui_util.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 
 namespace {
 
 void CloseBalloon(const std::string& id) {
+  // The browser process may have gone away during shutting down, in this case
+  // notification_ui_manager() will close the balloon in its destructor.
+  if (!g_browser_process)
+    return;
+
   g_browser_process->notification_ui_manager()->CancelById(id);
 }
 
 // Prefix added to the notification ids.
 const char kNotificationPrefix[] = "desktop_notification_balloon.";
 
 // Timeout for automatically dismissing the notification balloon.
 const size_t kTimeoutSeconds = 6;
 
 class DummyNotificationDelegate : public NotificationDelegate {
@@ skipping 43 matching lines @@
       GURL(), content_url, string16(), string16(),
       new DummyNotificationDelegate(base::IntToString(id_count_++))));
 
   // Allowing IO access is required here to cover the corner case where
   // there is no last used profile and the default one is loaded.
   // IO access won't be required for normal uses.
   base::ThreadRestrictions::ScopedAllowIO allow_io;
   g_browser_process->notification_ui_manager()->Add(
       *notification_.get(), ProfileManager::GetLastUsedProfile());
 }