Basic windowless plugins, try 2.

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.
 
 #include "config.h"
 
+#include "build/build_config.h"
+#if defined(OS_LINUX)
+#define MOZ_X11 1
+#endif
+
 #include "webkit/glue/plugins/plugin_instance.h"
 
 #include "base/file_util.h"
 #include "base/lazy_instance.h"
 #include "base/message_loop.h"
 #include "base/string_util.h"
 #include "base/thread_local.h"
 #include "webkit/glue/glue_util.h"
 #include "webkit/glue/webplugin.h"
 #include "webkit/glue/webkit_glue.h"
@@ skipping 106 matching lines @@
 bool PluginInstance::HandleEvent(UINT message, WPARAM wParam, LPARAM lParam) {
   if (!windowless_)
     return false;
 
   NPEvent windowEvent;
   windowEvent.event = message;
   windowEvent.lParam = static_cast<uint32>(lParam);
   windowEvent.wParam = static_cast<uint32>(wParam);
   return NPP_HandleEvent(&windowEvent) != 0;
 }
+#elif defined(OS_LINUX)
+bool PluginInstance::HandleEvent(XEvent* event) {
+  if (!windowless_)
+    return false;
+  return NPP_HandleEvent(event);
+}
 #endif
 
 bool PluginInstance::Start(const GURL& url,
                            char** const param_names,
                            char** const param_values,
                            int param_count,
                            bool load_manually) {
   load_manually_ = load_manually;
   instance_url_ = url;
   unsigned short mode = load_manually_ ? NP_FULL : NP_EMBED;
@@ skipping 353 matching lines @@
           stream->url, range_info.c_str(),
           plugin_stream,
           plugin_stream->notify_needed(),
           plugin_stream->notify_data());
       break;
     }
   }
 }
 
 }  // namespace NPAPI