Keep the module in scope when executing scripts. This prevents a crash when the

webkit/plugins/ppapi/ppb_proxy_impl.cc

 // Copyright (c) 2011 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 "webkit/plugins/ppapi/ppb_proxy_impl.h"
 
 #include "ppapi/c/private/ppb_proxy_private.h"
 #include "webkit/plugins/ppapi/plugin_module.h"
 #include "webkit/plugins/ppapi/ppapi_plugin_instance.h"
 #include "webkit/plugins/ppapi/ppb_url_loader_impl.h"
@@ skipping 26 matching lines @@
 }
 
 int32_t GetURLLoaderBufferedBytes(PP_Resource url_loader) {
  scoped_refptr<PPB_URLLoader_Impl> loader(
       Resource::GetAs<PPB_URLLoader_Impl>(url_loader));
   if (!loader)
     return 0;
   return loader->buffer_size();
 }
 
+void AddRefModule(PP_Module module) {
+  PluginModule* plugin_module = ResourceTracker::Get()->GetModule(module);
+  if (plugin_module)
+    plugin_module->AddRef();
+}
+
+void ReleaseModule(PP_Module module) {
+  PluginModule* plugin_module = ResourceTracker::Get()->GetModule(module);
+  if (plugin_module)
+    plugin_module->Release();
+}
+
 const PPB_Proxy_Private ppb_proxy = {
   &PluginCrashed,
   &GetInstanceForResource,
   &SetReserveInstanceIDCallback,
-  &GetURLLoaderBufferedBytes
+  &GetURLLoaderBufferedBytes,
+  &AddRefModule,
+  &ReleaseModule
 };
 
 }  // namespace
 
 // static
 const PPB_Proxy_Private* PPB_Proxy_Impl::GetInterface() {
   return &ppb_proxy;
 }
 
 }  // namespace ppapi
 }  // namespace webkit