Adjust positioning of cros tray bubbles.

ui/message_center/views/message_bubble_base.cc

 // Copyright (c) 2012 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_bubble_base.h"
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/single_thread_task_runner.h"
 #include "base/threading/thread_task_runner_handle.h"
@@ skipping 52 matching lines @@
     return;
 
   max_height_ = height;
   if (bubble_view_)
     bubble_view_->SetMaxHeight(max_height_);
 }
 
 views::TrayBubbleView::InitParams MessageBubbleBase::GetDefaultInitParams(
     views::TrayBubbleView::AnchorAlignment anchor_alignment) {
   views::TrayBubbleView::InitParams init_params(
-      views::TrayBubbleView::ANCHOR_TYPE_TRAY,
       anchor_alignment,
       kNotificationWidth,
       kNotificationWidth);
-  init_params.arrow_color = kBackgroundDarkColor;
+  init_params.bg_color = kBackgroundDarkColor;
   return init_params;
 }
 
 }  // namespace message_center