linux: implement gpu plugin

gpu/gpu_plugin/gpu_plugin.cc

 // Copyright (c) 2009 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 "gpu/gpu_plugin/gpu_plugin.h"
 #include "webkit/glue/plugins/nphostapi.h"
 
 namespace gpu_plugin {
 
 // Definitions of NPAPI plugin entry points.
@@ skipping 20 matching lines @@
   return NPERR_NO_ERROR;
 }
 
 int16 NPP_HandleEvent(NPP instance, void* event) {
   return 0;
 }
 
 NPError NPP_GetValue(NPP instance, NPPVariable variable, void *value) {
   if (!instance)
     return NPERR_INVALID_INSTANCE_ERROR;
-
-  return NPERR_GENERIC_ERROR;
+  switch (variable) {
+    case NPPVpluginNeedsXEmbed:
+      *static_cast<NPBool *>(value) = 1;
+      return NPERR_NO_ERROR;
+    default:
+      return NPERR_INVALID_PARAM;
+  }
 }
 
 NPError NPP_SetValue(NPP instance, NPNVariable variable, void *value) {
   return NPERR_NO_ERROR;
 }
 }
 
 NPError API_CALL NP_GetEntryPoints(NPPluginFuncs* funcs) {
   funcs->newp = NPP_New;
   funcs->destroy = NPP_Destroy;
@@ skipping 17 matching lines @@
   NP_GetEntryPoints(plugin_funcs);
 #endif
 
   return NPERR_NO_ERROR;
 }
 
 NPError API_CALL NP_Shutdown() {
   return NPERR_NO_ERROR;
 }
 }  // namespace gpu_plugin