Revert of Remove a bunch of NPAPI quirks and related support code

content/child/npapi/plugin_instance.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 "content/child/npapi/plugin_instance.h"
 
 #include <string.h>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 17 matching lines @@
 #include <ApplicationServices/ApplicationServices.h>
 #endif
 
 namespace content {
 
 PluginInstance::PluginInstance(PluginLib* plugin, const std::string& mime_type)
     : plugin_(plugin),
       npp_(0),
       host_(PluginHost::Singleton()),
       npp_functions_(plugin->functions()),
+      window_handle_(0),
       transparent_(true),
       webplugin_(0),
       mime_type_(mime_type),
       use_mozilla_user_agent_(false),
 #if defined (OS_MACOSX)
 #ifdef NP_NO_QUICKDRAW
       drawing_model_(NPDrawingModelCoreGraphics),
 #else
       drawing_model_(NPDrawingModelQuickDraw),
 #endif
@@ skipping 371 matching lines @@
   if (dest_y)
     *dest_y = target_y;
   return true;
 #else
   NOTIMPLEMENTED();
   return false;
 #endif
 }
 
 }  // namespace content