Remove the most obvious dead code from message center.

ui/message_center/message_center_tray.cc

 // Copyright (c) 2013 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 "ui/message_center/message_center_tray.h"
 
 #include "base/observer_list.h"
 #include "base/strings/utf_string_conversions.h"
 #include "grit/ui_strings.h"
 #include "ui/base/l10n/l10n_util.h"
@@ skipping 54 matching lines @@
     HideMessageCenterBubble();
   else
     ShowMessageCenterBubble();
 }
 
 void MessageCenterTray::ShowPopupBubble() {
   if (message_center_visible_)
     return;
 
   if (popups_visible_) {
-    delegate_->UpdatePopups();
     NotifyMessageCenterTrayChanged();
     return;
   }
 
   if (!message_center_->HasPopupNotifications())
     return;
 
   popups_visible_ = delegate_->ShowPopups();
   NotifyMessageCenterTrayChanged();
 }
@@ skipping 60 matching lines @@
 void MessageCenterTray::OnNotificationDisplayed(
     const std::string& notification_id) {
   NotifyMessageCenterTrayChanged();
 }
 
 void MessageCenterTray::OnMessageCenterChanged() {
   if (message_center_visible_) {
     if (message_center_->NotificationCount() == 0)
       HideMessageCenterBubble();
   }
-  if (popups_visible_) {
-    if (message_center_->HasPopupNotifications())
-      delegate_->UpdatePopups();
-    else
-      HidePopupBubble();
-  } else if (message_center_->HasPopupNotifications()) {
+
+  if (popups_visible_ && !message_center_->HasPopupNotifications())
+    HidePopupBubble();
+  else if (message_center_->HasPopupNotifications())
     ShowPopupBubble();
-  }
 
   NotifyMessageCenterTrayChanged();
 }
 
 bool MessageCenterTray::IsCommandIdChecked(int command_id) const {
   if (command_id != kToggleQuietMode)
     return false;
   return message_center()->IsQuietMode();
 }
 
@@ skipping 19 matching lines @@
       base::TimeDelta::FromHours(1);
   message_center()->EnterQuietModeWithExpire(expires_in);
   NotifyMessageCenterTrayChanged();
 }
 
 void MessageCenterTray::NotifyMessageCenterTrayChanged() {
   delegate_->OnMessageCenterTrayChanged();
 }
 
 }  // namespace message_center