Stop using shell::GetInstance()->system_tray() in system tray items

ash/system/drive/tray_drive.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/drive/tray_drive.h"
 
 #include <vector>
 
 #include "ash/shell.h"
 #include "ash/system/tray/system_tray.h"
@@ skipping 370 matching lines @@
 }
 
 TrayDrive::~TrayDrive() {
 }
 
 bool TrayDrive::GetInitialVisibility() {
   scoped_ptr<DriveOperationStatusList> list(GetCurrentOperationList());
   return list->size() > 0;
 }
 
-views::View* TrayDrive::CreateDefaultView(user::LoginStatus status) {
+views::View* TrayDrive::CreateDefaultView(user::LoginStatus status,
+                                          int bubble_width) {
   DCHECK(!default_);
 
   if (status != user::LOGGED_IN_USER && status != user::LOGGED_IN_OWNER)
     return NULL;
 
   scoped_ptr<DriveOperationStatusList> list(GetCurrentOperationList());
   if (!list->size())
     return NULL;
 
   default_ = new tray::DriveDefaultView(this, list.get());
@@ skipping 37 matching lines @@
 
   if (default_)
     default_->Update(&list);
 
   if (detailed_)
     detailed_->Update(&list);
 }
 
 }  // namespace internal
 }  // namespace ash