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

ash/system/tray_caps_lock.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_caps_lock.h"
 
 #include "ash/caps_lock_delegate.h"
 #include "ash/shell.h"
 #include "ash/system/tray/tray_constants.h"
 #include "ash/system/tray/tray_views.h"
@@ skipping 100 matching lines @@
           Shell::GetInstance()->caps_lock_delegate()->IsCapsLockEnabled()),
       message_shown_(false) {
 }
 
 TrayCapsLock::~TrayCapsLock() {}
 
 bool TrayCapsLock::GetInitialVisibility() {
   return Shell::GetInstance()->caps_lock_delegate()->IsCapsLockEnabled();
 }
 
-views::View* TrayCapsLock::CreateDefaultView(user::LoginStatus status) {
+views::View* TrayCapsLock::CreateDefaultView(user::LoginStatus status,
+                                             int bubble_width) {
   if (!caps_lock_enabled_)
     return NULL;
   DCHECK(default_ == NULL);
   default_ = new CapsLockDefaultView;
   default_->Update(caps_lock_enabled_, search_mapped_to_caps_lock_);
   return default_;
 }
 
 views::View* TrayCapsLock::CreateDetailedView(user::LoginStatus status) {
   DCHECK(detailed_ == NULL);
@@ skipping 46 matching lines @@
         message_shown_ = true;
       }
     } else if (detailed_) {
       detailed_->GetWidget()->Close();
     }
   }
 }
 
 }  // namespace internal
 }  // namespace ash