Fixes use after free during drag and drop.

chrome/browser/ui/views/frame/browser_frame_win.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 "chrome/browser/ui/views/frame/browser_frame_win.h"
 
 #include <dwmapi.h>
 #include <shellapi.h>
 #include <set>
 
@@ skipping 504 matching lines @@
   return *title_font;
 }
 
 bool BrowserFrame::ShouldLeaveOffsetNearTopBorder() {
   if (win8::IsSingleWindowMetroMode()) {
     if (ui::GetDisplayLayout() == ui::LAYOUT_DESKTOP)
       return false;
   }
   return !IsMaximized();
 }
-
-////////////////////////////////////////////////////////////////////////////////
-// NativeBrowserFrame, public:
-
-// static
-NativeBrowserFrame* NativeBrowserFrame::CreateNativeBrowserFrame(
-    BrowserFrame* browser_frame,
-    BrowserView* browser_view) {
-  return new BrowserFrameWin(browser_frame, browser_view);
-}