Try a new approach to fixing IAT unpatch crashes when the DLL is gone.

webkit/glue/plugins/webplugin_delegate_impl.h

 // Copyright (c) 2006-2008 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 WEBKIT_GLUE_PLUGIN_WEBPLUGIN_DELEGATE_IMPL_H_
 #define WEBKIT_GLUE_PLUGIN_WEBPLUGIN_DELEGATE_IMPL_H_
 
 #include "build/build_config.h"
 
 #include <string>
@@ skipping 229 matching lines @@
   // This flag indicates whether we started tracking a user gesture message.
   bool user_gesture_message_posted_;
 
   // Runnable Method Factory used to invoke the OnUserGestureEnd method
   // asynchronously.
 #if !defined(OS_LINUX)
   ScopedRunnableMethodFactory<WebPluginDelegateImpl> user_gesture_msg_factory_;
 #endif
 
 #if defined(OS_WIN)
-  // The plugin module handle.
-  HMODULE plugin_module_handle_;
-
   // TrackPopupMenu interceptor. Parameters are the same as the Win32 function
   // TrackPopupMenu.
   static BOOL WINAPI TrackPopupMenuPatch(HMENU menu, unsigned int flags, int x,
                                          int y, int reserved, HWND window,
                                          const RECT* rect);
 
   // SetCursor interceptor for windowless plugins.
   static HCURSOR WINAPI SetCursorPatch(HCURSOR cursor);
 #endif
 
   // Holds the current cursor set by the windowless plugin.
   WebCursor current_windowless_cursor_;
 
   friend class WebPluginDelegate;
 
   DISALLOW_EVIL_CONSTRUCTORS(WebPluginDelegateImpl);
 };
 
 #endif  // #ifndef WEBKIT_GLUE_PLUGIN_WEBPLUGIN_DELEGATE_IMPL_H_