Adjust positioning of cros tray bubbles.

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 d922c78f7926705fa47148da1397c02c70cba959..c135b2178a872855a18f096db99fec54fa13aabc 100644
--- a/ui/message_center/views/message_center_bubble.cc
+++ b/ui/message_center/views/message_center_bubble.cc
@@ -60,12 +60,10 @@ void ContentsView::ChildPreferredSizeChanged(View* child) {
 // MessageCenterBubble /////////////////////////////////////////////////////////
 
 MessageCenterBubble::MessageCenterBubble(MessageCenter* message_center,
-                                         MessageCenterTray* tray,
-                                         bool first_item_has_no_margin)
+                                         MessageCenterTray* tray)
     : MessageBubbleBase(message_center, tray),
       message_center_view_(NULL),
-      initially_settings_visible_(false),
-      first_item_has_no_margin_(first_item_has_no_margin) {}
+      initially_settings_visible_(false) {}
 
 MessageCenterBubble::~MessageCenterBubble() {
   // Removs this from the widget observers just in case. MessageCenterBubble
@@ -89,7 +87,6 @@ views::TrayBubbleView::InitParams MessageCenterBubble::GetInitParams(
   init_params.max_width += kMarginBetweenItems * 2;
   init_params.max_height = max_height();
   init_params.can_activate = true;
-  init_params.first_item_has_no_margin = first_item_has_no_margin_;
   return init_params;
 }