WIP - loop in LayoutManager for preferred size changes

ui/message_center/views/message_center_view.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/views/message_center_view.h"
 
 #include <map>
 
 #include "base/stl_util.h"
 #include "grit/ui_resources.h"
@@ skipping 237 matching lines @@
                     1.0f, views::GridLayout::USE_PREF, 0, 0);
   column->AddColumn(views::GridLayout::LEADING, views::GridLayout::FILL,
                     0, views::GridLayout::USE_PREF, 0, 0);
   layout->StartRow(0, 0);
   layout->AddView(notification_label);
   layout->AddView(button_container);
 }
 
 // Overridden from views::View:
 void RichMessageCenterButtonBar::ChildVisibilityChanged(views::View* child) {
-  InvalidateLayout();
+  Layout();
 }
 
 // Overridden from views::ButtonListener:
 void RichMessageCenterButtonBar::ButtonPressed(views::Button* sender,
                                                const ui::Event& event) {
   if (sender == close_all_button()) {
     message_center()->RemoveAllNotifications(true);  // Action by user.
   } else if (sender == settings_button_) {
     message_center()->ShowNotificationSettingsDialog(
         GetWidget()->GetNativeView());
@@ skipping 640 matching lines @@
 void MessageCenterView::NotificationsChanged() {
   if (!message_views_.empty()) {
     no_notifications_message_view_->SetVisible(false);
     button_bar_->SetCloseAllVisible(true);
     scroller_->set_focusable(true);
   } else {
     no_notifications_message_view_->SetVisible(true);
     button_bar_->SetCloseAllVisible(false);
     scroller_->set_focusable(false);
   }
-  scroller_->InvalidateLayout();
   PreferredSizeChanged();
-  Layout();
+  scroller_->Layout();
 }
 
 void MessageCenterView::SetNotificationViewForTest(views::View* view) {
   message_list_view_->AddNotificationAt(view, 0);
 }
 
 }  // namespace message_center