ash: Make sure all the sub-popups retain the same height as the main popup.

ash/system/tray/system_tray_item.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_item.h"
 
 #include "ash/shell.h"
 #include "ash/system/tray/system_tray.h"
 #include "ui/views/view.h"
 
@@ skipping 26 matching lines @@
 
 void SystemTrayItem::DestroyDefaultView() {
 }
 
 void SystemTrayItem::DestroyDetailedView() {
 }
 
 void SystemTrayItem::DestroyNotificationView() {
 }
 
+void SystemTrayItem::TransitionDetailedView() {
+  Shell::GetInstance()->tray()->ShowDetailedView(this, 0, true,
+      BUBBLE_USE_EXISTING);
+}
+
 void SystemTrayItem::PopupDetailedView(int for_seconds, bool activate) {
-  Shell::GetInstance()->tray()->ShowDetailedView(this, for_seconds, activate);
+  Shell::GetInstance()->tray()->ShowDetailedView(this, for_seconds, activate,
+      BUBBLE_CREATE_NEW);
 }
 
 void SystemTrayItem::SetDetailedViewCloseDelay(int for_seconds) {
   Shell::GetInstance()->tray()->SetDetailedViewCloseDelay(for_seconds);
 }
 
 void SystemTrayItem::ShowNotificationView() {
   Shell::GetInstance()->tray()->ShowNotificationView(this);
 }
 
 void SystemTrayItem::HideNotificationView() {
   Shell::GetInstance()->tray()->HideNotificationView(this);
 }
 
 }  // namespace ash