Remove win_util::FormatMessage and FormatLastWin32Error. These were only used...

app/win/scoped_prop.cc

 // Copyright (c) 2010 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 "app/win/scoped_prop.h"
 
 #include "base/win_util.h"
 
 namespace app {
 
 namespace win {
 
 ScopedProp::ScopedProp(HWND hwnd, const std::wstring& key, HANDLE data)
     : hwnd_(hwnd),
       key_(key) {
   BOOL result = SetProp(hwnd, key.c_str(), data);
   // Failure to set a propery on a window is typically fatal. It means someone
   // is going to ask for the property and get NULL. So, rather than crash later
   // on when someone expects a non-NULL value we crash here in hopes of
   // diagnosing the failure.
-  CHECK(result) << win_util::FormatLastWin32Error();
+  CHECK(result) << ::GetLastError();
 }
 
 ScopedProp::~ScopedProp() {
   DCHECK(IsWindow(hwnd_));
   RemoveProp(hwnd_, key_.c_str());
 }
 
 
 }  // namespace win
 
 }  // namespace app