Re-land http://codereview.chromium.org/211031 with a bug opened...

webkit/glue/plugins/plugin_instance.cc

 // 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.
 
 // Pepper API support should be enabled for this file.
 #define PEPPER_APIS_ENABLED
 
 #include "build/build_config.h"
 
 #include "webkit/glue/plugins/plugin_instance.h"
@@ skipping 16 matching lines @@
     : plugin_(plugin),
       npp_(0),
       host_(PluginHost::Singleton()),
       npp_functions_(plugin->functions()),
       window_handle_(0),
       windowless_(false),
       transparent_(true),
       webplugin_(0),
       mime_type_(mime_type),
       use_mozilla_user_agent_(false),
+#if defined (OS_MACOSX)
+      drawing_model_(0),
+      event_model_(0),
+#endif
       message_loop_(MessageLoop::current()),
       load_manually_(false),
       in_close_streams_(false) {
   npp_ = new NPP_t();
   npp_->ndata = 0;
   npp_->pdata = 0;
 
   memset(&zero_padding_, 0, sizeof(zero_padding_));
   DCHECK(message_loop_);
 }
@@ skipping 395 matching lines @@
           stream->url, range_info.c_str(),
           reinterpret_cast<intptr_t>(plugin_stream),
           plugin_stream->notify_needed(),
           reinterpret_cast<intptr_t>(plugin_stream->notify_data()));
       break;
     }
   }
 }
 
 }  // namespace NPAPI