Update cached height for popup notifications after shelf alignment changes

ash/system/tray/system_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/tray/system_tray.h"
 
 #include "ash/ash_switches.h"
 #include "ash/metrics/user_metrics_recorder.h"
 #include "ash/shelf/shelf_layout_manager.h"
 #include "ash/shelf/shelf_util.h"
@@ skipping 601 matching lines @@
   if (alignment == shelf_alignment())
     return;
   TrayBackgroundView::SetShelfAlignment(alignment);
   UpdateAfterShelfAlignmentChange(alignment);
   // Destroy any existing bubble so that it is rebuilt correctly.
   CloseSystemBubbleAndDeactivateSystemTray();
   // Rebuild any notification bubble.
   if (notification_bubble_) {
     notification_bubble_.reset();
     UpdateNotificationBubble();
+    // UpdateWebNotifications() should be called in UpdateNotificationBubble().
+  } else if (!hide_notifications_) {
+    UpdateWebNotifications();
   }
 }
 
 void SystemTray::AnchorUpdated() {
   if (notification_bubble_) {
     notification_bubble_->bubble_view()->UpdateBubble();
     // Ensure that the notification buble is above the shelf/status area.
     notification_bubble_->bubble_view()->GetWidget()->StackAtTop();
     UpdateBubbleViewArrow(notification_bubble_->bubble_view());
   }
@@ skipping 91 matching lines @@
   system_bubble_.reset();
   // When closing a system bubble with the alternate shelf layout, we need to
   // turn off the active tinting of the shelf.
   if (full_system_tray_menu_) {
     SetDrawBackgroundAsActive(false);
     full_system_tray_menu_ = false;
   }
 }
 
 }  // namespace ash