Fix plugin hang that Earth team found....

chrome/plugin/npobject_util.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.
 //
 // Helper functions that are used by the NPObject proxy and stub.
 
 #ifndef CHROME_PLUGIN_NPOBJECT_UTIL_H__
 #define CHROME_PLUGIN_NPOBJECT_UTIL_H__
 
 #include "build/build_config.h"
@@ skipping 30 matching lines @@
 NPIdentifier CreateNPIdentifier(const  NPIdentifier_Param& param);
 
 // Creates an object similar to NPVariant that can be marshalled.
 // If the containing NPObject happens to be an NPObject, then a stub
 // is created around it and param holds the routing id for it.
 // If release is true, the NPVariant object is released (except if
 // it contains an NPObject, since the stub will manage its lifetime).
 void CreateNPVariantParam(const NPVariant& variant,
                           PluginChannelBase* channel,
                           NPVariant_Param* param,
-                          bool release);
+                          bool release,
+                          base::WaitableEvent* modal_dialog_event);
 
 #if defined(OS_WIN)
 // Creates an NPVariant from the marshalled object.
 void CreateNPVariant(const NPVariant_Param& param,
                      PluginChannelBase* channel,
                      NPVariant* result,
                      base::WaitableEvent* modal_dialog_event);
 
 // Given a plugin's HWND, returns an event associated with the WebContents
 // that's set when inside a messagebox.  This tells the plugin process that
 // the message queue should be pumped (as what would happen if everything was
 // in-process).  This avoids deadlocks when a plugin invokes javascript that
 // causes a message box to come up.
 HANDLE GetMessageBoxEvent(HWND hwnd);
 #endif  // defined(OS_WIN)
 
 #endif  // CHROME_PLUGIN_NPOBJECT_UTIL_H__