Fix popup crash on ChromeOS.

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 84 matching lines @@
   HidePopupBubbleInternal();
   NotifyMessageCenterTrayChanged();
 
   return true;
 }
 
 void MessageCenterTray::HidePopupBubbleInternal() {
   if (!popups_visible_)
     return;
 
-  // This is called before HidePopups so that we don't double-call this when we
-  // see the results of HidePopups via MessageCenterObserver.
+  delegate_->HidePopups();
   popups_visible_ = false;
-
-  delegate_->HidePopups();
 }
 
 void MessageCenterTray::ShowNotifierSettingsBubble() {
   if (popups_visible_)
     HidePopupBubbleInternal();
 
   message_center_visible_ = delegate_->ShowNotifierSettings();
   message_center_->SetVisibility(message_center::VISIBILITY_SETTINGS);
 
   NotifyMessageCenterTrayChanged();
@@ skipping 47 matching lines @@
     ShowPopupBubble();
 
   NotifyMessageCenterTrayChanged();
 }
 
 void MessageCenterTray::NotifyMessageCenterTrayChanged() {
   delegate_->OnMessageCenterTrayChanged();
 }
 
 }  // namespace message_center