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

ash/system/chromeos/network/tray_network.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/chromeos/network/tray_network.h"
 
 #include "ash/shell.h"
 #include "ash/system/chromeos/network/network_list_detailed_view_base.h"
 #include "ash/system/tray/system_tray.h"
 #include "ash/system/tray/system_tray_delegate.h"
@@ skipping 505 matching lines @@
 
 TrayNetwork::~TrayNetwork() {
 }
 
 views::View* TrayNetwork::CreateTrayView(user::LoginStatus status) {
   CHECK(tray_ == NULL);
   tray_ = new tray::NetworkTrayView(tray::LIGHT, true /*tray_icon*/);
   return tray_;
 }
 
-views::View* TrayNetwork::CreateDefaultView(user::LoginStatus status) {
+views::View* TrayNetwork::CreateDefaultView(user::LoginStatus status,
+                                            int bubble_width) {
   CHECK(default_ == NULL);
   default_ =
       new tray::NetworkDefaultView(this, status != user::LOGGED_IN_LOCKED);
   return default_;
 }
 
 views::View* TrayNetwork::CreateDetailedView(user::LoginStatus status) {
   CHECK(detailed_ == NULL);
   // Clear any notifications when showing the detailed view.
   messages_->messages().clear();
@@ skipping 86 matching lines @@
 
 void TrayNetwork::LinkClicked(MessageType message_type, int link_id) {
   tray::NetworkMessages::MessageMap::const_iterator iter =
       messages()->messages().find(message_type);
   if (iter != messages()->messages().end() && iter->second.delegate)
     iter->second.delegate->NotificationLinkClicked(link_id);
 }
 
 }  // namespace internal
 }  // namespace ash