Replace deprecated base::NonThreadSafe in chrome/browser/ui/views in favor of SequenceChecker.

chrome/browser/ui/views/status_icons/status_tray_state_changer_win.h

 // Copyright 2014 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.
 
 #ifndef CHROME_BROWSER_UI_VIEWS_STATUS_ICONS_STATUS_TRAY_STATE_CHANGER_WIN_H_
 #define CHROME_BROWSER_UI_VIEWS_STATUS_ICONS_STATUS_TRAY_STATE_CHANGER_WIN_H_
 
 #include <memory>
 
 #include "base/macros.h"
 #include "base/strings/string16.h"
-#include "base/threading/non_thread_safe.h"
+#include "base/threading/thread_checker.h"
 #include "base/win/iunknown_impl.h"
 #include "base/win/scoped_comptr.h"
 
 // The known values for NOTIFYITEM's dwPreference member.
 enum NOTIFYITEM_PREFERENCE {
   // In Windows UI: "Only show notifications."
   PREFERENCE_SHOW_WHEN_ACTIVE = 0,
   // In Windows UI: "Hide icon and notifications."
   PREFERENCE_SHOW_NEVER = 1,
   // In Windows UI: "Show icon and notifications."
@@ skipping 23 matching lines @@
  public:
   virtual HRESULT STDMETHODCALLTYPE
       Notify(ULONG event, NOTIFYITEM* notify_item) = 0;
 };
 
 // A class that is capable of reading and writing the state of the notification
 // area in the Windows taskbar.  It is used to promote a tray icon from the
 // overflow area to the taskbar, and refuses to do anything if the user has
 // explicitly marked an icon to be always hidden.
 class StatusTrayStateChangerWin : public INotificationCB,
-                                  public base::win::IUnknownImpl,
-                                  public base::NonThreadSafe {
+                                  public base::win::IUnknownImpl {
  public:
   StatusTrayStateChangerWin(UINT icon_id, HWND window);
 
   // Call this method to move the icon matching |icon_id| and |window| to the
   // taskbar from the overflow area.  This will not make any changes if the
   // icon has been set to |PREFERENCE_SHOW_NEVER|, in order to comply with
   // the explicit wishes/configuration of the user.
   void EnsureTrayIconVisible();
 
   // IUnknown.
@@ skipping 54 matching lines @@
   base::string16 file_name_;
 
   // Temporary storage for the matched NOTIFYITEM.  This is necessary because
   // Notify doesn't return anything.  The call flow looks like this:
   //   TrayNotify->RegisterCallback()
   //      ... other COM stack frames ..
   //   StatusTrayStateChangerWin->Notify(NOTIFYITEM);
   // so we can't just return the notifyitem we're looking for.
   std::unique_ptr<NOTIFYITEM> notify_item_;
 
+  THREAD_CHECKER(thread_checker_);
+
   DISALLOW_COPY_AND_ASSIGN(StatusTrayStateChangerWin);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_STATUS_ICONS_STATUS_TRAY_STATE_CHANGER_WIN_H_