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

ash/system/bluetooth/tray_bluetooth.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/bluetooth/tray_bluetooth.h"
 
 #include "ash/shell.h"
 #include "ash/system/tray/system_tray.h"
 #include "ash/system/tray/system_tray_delegate.h"
 #include "ash/system/tray/tray_constants.h"
@@ skipping 207 matching lines @@
       detailed_(NULL) {
 }
 
 TrayBluetooth::~TrayBluetooth() {
 }
 
 views::View* TrayBluetooth::CreateTrayView(user::LoginStatus status) {
   return NULL;
 }
 
-views::View* TrayBluetooth::CreateDefaultView(user::LoginStatus status) {
+views::View* TrayBluetooth::CreateDefaultView(user::LoginStatus status,
+                                              int bubble_width) {
   CHECK(default_ == NULL);
   default_ = new tray::BluetoothDefaultView(this);
   return default_;
 }
 
 views::View* TrayBluetooth::CreateDetailedView(user::LoginStatus status) {
   if (!Shell::GetInstance()->tray_delegate()->GetBluetoothAvailable())
     return NULL;
   CHECK(detailed_ == NULL);
   detailed_ = new tray::BluetoothDetailedView(status);
@@ skipping 26 matching lines @@
 void TrayBluetooth::OnBluetoothDiscoveringChanged() {
   if (!detailed_)
     return;
   BluetoothDeviceList list;
   Shell::GetInstance()->tray_delegate()->GetAvailableBluetoothDevices(&list);
   detailed_->Update(list);
 }
 
 }  // namespace internal
 }  // namespace ash