ash: Explicitly teach various components about ShelfLayoutManager.

ash/system/web_notification/web_notification_tray.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 "ash/system/web_notification/web_notification_tray.h"
 
 #include "ash/ash_switches.h"
 #include "ash/root_window_controller.h"
 #include "ash/shelf/shelf_layout_manager.h"
 #include "ash/shelf/shelf_layout_manager_observer.h"
@@ skipping 164 matching lines @@
       should_block_shelf_auto_hide_(false) {
   button_ = new WebNotificationButton(this);
   button_->set_triggerable_event_flags(
       ui::EF_LEFT_MOUSE_BUTTON | ui::EF_RIGHT_MOUSE_BUTTON);
   tray_container()->AddChildView(button_);
   SetContentsBackground();
   tray_container()->SetBorder(views::Border::NullBorder());
   message_center_tray_.reset(new message_center::MessageCenterTray(
       this,
       message_center::MessageCenter::Get()));
-  popup_alignment_delegate_.reset(new AshPopupAlignmentDelegate());
+  popup_alignment_delegate_.reset(new AshPopupAlignmentDelegate(
+      status_area_widget->shelf_widget()->shelf_layout_manager()));
   popup_collection_.reset(new message_center::MessagePopupCollection(
       ash::Shell::GetContainer(
           status_area_widget->GetNativeView()->GetRootWindow(),
           kShellWindowId_StatusContainer),
       message_center(),
       message_center_tray_.get(),
       popup_alignment_delegate_.get()));
   const gfx::Display& display =
       gfx::Screen::GetScreen()->GetDisplayNearestWindow(
           status_area_widget->GetNativeView());
@@ skipping 299 matching lines @@
 
 message_center::MessageCenterBubble*
 WebNotificationTray::GetMessageCenterBubbleForTest() {
   if (!message_center_bubble())
     return NULL;
   return static_cast<message_center::MessageCenterBubble*>(
       message_center_bubble()->bubble());
 }
 
 }  // namespace ash