Message center re-organized

ui/message_center/views/message_center_bubble.cc

Index: ui/message_center/views/message_center_bubble.cc
diff --git a/ui/message_center/views/message_center_bubble.cc b/ui/message_center/views/message_center_bubble.cc
index e91dfa6b00b11ac0afff9ff82f6965c829ad1d84..4f0c0001c153a05cee2c3ec6b61b89930c1770f7 100644
--- a/ui/message_center/views/message_center_bubble.cc
+++ b/ui/message_center/views/message_center_bubble.cc
@@ -89,7 +89,12 @@ void MessageCenterBubble::InitializeContents(
     views::TrayBubbleView* new_bubble_view) {
   set_bubble_view(new_bubble_view);
   message_center_view_ = new MessageCenterView(
-      message_center(), tray(), max_height(), initially_settings_visible_);
+      message_center(),
+      tray(),
+      max_height(),
+      initially_settings_visible_,
+      false /* MessageCenterBubble should be used only on ChromeOS.
+               Buttons are always on bottom for ChromeOS. */);
   bubble_view()->AddChildView(new ContentsView(this, message_center_view_));
   // Resize the content of the bubble view to the given bubble size. This is
   // necessary in case of the bubble border forcing a bigger size then the