Remove balloon notification code. The last user was the Linux GTK port but that's deleted now.

chrome/browser/notifications/sync_notifier/welcome_delegate.cc

 // Copyright 2014 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 "base/message_loop/message_loop.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/notifications/desktop_notification_service.h"
 #include "chrome/browser/notifications/desktop_notification_service_factory.h"
 #include "chrome/browser/notifications/message_center_notification_manager.h"
 #include "chrome/browser/notifications/notification_ui_manager.h"
 #include "chrome/browser/notifications/sync_notifier/chrome_notifier_service.h"
 #include "chrome/browser/notifications/sync_notifier/chrome_notifier_service_factory.h"
 #include "chrome/browser/notifications/sync_notifier/welcome_delegate.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser_navigator.h"
 #include "ui/message_center/message_center.h"
 #include "ui/message_center/message_center_util.h"
 #include "url/gurl.h"
 
 namespace notifier {
 namespace {
 void UpdateMessageCenter() {
   NotificationUIManager* notification_ui_manager =
       g_browser_process->notification_ui_manager();
-  if (notification_ui_manager->DelegatesToMessageCenter()) {
-    MessageCenterNotificationManager* message_center_notification_manager =
-        static_cast<MessageCenterNotificationManager*>(notification_ui_manager);
+  MessageCenterNotificationManager* message_center_notification_manager =
+      static_cast<MessageCenterNotificationManager*>(notification_ui_manager);
 
-    message_center_notification_manager->EnsureMessageCenterClosed();
-  }
+  message_center_notification_manager->EnsureMessageCenterClosed();
 }
 }  // namespace
 
 WelcomeDelegate::WelcomeDelegate(const std::string& notification_id,
                                  Profile* profile,
                                  const message_center::NotifierId notifier_id,
                                  const GURL& on_click_link)
     : notification_id_(notification_id),
       profile_(profile),
       notifier_id_(notifier_id),
@@ skipping 65 matching lines @@
   UpdateMessageCenter();
 }
 
 std::string WelcomeDelegate::id() const { return notification_id_; }
 
 content::RenderViewHost* WelcomeDelegate::GetRenderViewHost() const {
   return NULL;
 }
 
 }  // namespace notifier