[PPAPI] It is now possible to pass filesystems from JavaScript to NaCl modules.

content/renderer/pepper/host_var_tracker.cc

Index: content/renderer/pepper/host_var_tracker.cc
diff --git a/content/renderer/pepper/host_var_tracker.cc b/content/renderer/pepper/host_var_tracker.cc
index ed67dbaa616b0487a2e512d407e0d5e68a4f4c94..27f2977b08eede2ed23ac5f1c6202042264238fa 100644
--- a/content/renderer/pepper/host_var_tracker.cc
+++ b/content/renderer/pepper/host_var_tracker.cc
@@ -103,6 +103,17 @@ int HostVarTracker::GetLiveNPObjectVarsForInstance(PP_Instance instance) const {
   return static_cast<int>(found->second->size());
 }
 
+PP_Var HostVarTracker::MakeResourcePPVarFromMessage(
+    PP_Instance instance,
+    const IPC::Message& creation_message,
+    int pending_renderer_id,
+    int pending_browser_id) {
+  // On the host side, the creation message is ignored when creating a resource.
+  // Therefore, a call to this function indicates a null resource. Return the
+  // resource 0.
+  return MakeResourcePPVar(0);
+}
+
 ppapi::ResourceVar* HostVarTracker::MakeResourceVar(PP_Resource pp_resource) {
   return new HostResourceVar(pp_resource);
 }