Refactor FileSystem

ppapi/proxy/ppb_file_ref_proxy.cc

Index: ppapi/proxy/ppb_file_ref_proxy.cc
diff --git a/ppapi/proxy/ppb_file_ref_proxy.cc b/ppapi/proxy/ppb_file_ref_proxy.cc
index c63cccd1d083ba89fa9084ce221eb4065baa0b7f..87cb16ee58f2d320648437ee6fca0c1b6babd858 100644
--- a/ppapi/proxy/ppb_file_ref_proxy.cc
+++ b/ppapi/proxy/ppb_file_ref_proxy.cc
@@ -204,18 +204,13 @@ PPB_FileRef_Proxy::~PPB_FileRef_Proxy() {
 }
 
 // static
-PP_Resource PPB_FileRef_Proxy::CreateProxyResource(PP_Resource file_system,
+PP_Resource PPB_FileRef_Proxy::CreateProxyResource(PP_Instance instance,
+                                                   PP_Resource file_system,
                                                    const char* path) {
-  Resource* file_system_object =
-      PpapiGlobals::Get()->GetResourceTracker()->GetResource(file_system);
-  if (!file_system_object)
-    return 0;
-
   PPB_FileRef_CreateInfo create_info;
-  PluginDispatcher::GetForResource(file_system_object)->Send(
+  PluginDispatcher::GetForInstance(instance)->Send(
       new PpapiHostMsg_PPBFileRef_Create(
-          API_ID_PPB_FILE_REF, file_system_object->host_resource(),
-          path, &create_info));
+          API_ID_PPB_FILE_REF, instance, file_system, path, &create_info));
   return PPB_FileRef_Proxy::DeserializeFileRef(create_info);
 }
 
@@ -261,14 +256,16 @@ PP_Resource PPB_FileRef_Proxy::DeserializeFileRef(
 }
 
 #if !defined(OS_NACL)
-void PPB_FileRef_Proxy::OnMsgCreate(const HostResource& file_system,
+void PPB_FileRef_Proxy::OnMsgCreate(PP_Instance pp_instance,
+                                    PP_Resource file_system,
                                     const std::string& path,
                                     PPB_FileRef_CreateInfo* result) {
-  thunk::EnterResourceCreation enter(file_system.instance());
+  thunk::EnterResourceCreation enter(pp_instance);
   if (enter.failed())
     return;
+
   PP_Resource resource = enter.functions()->CreateFileRef(
-      file_system.host_resource(), path.c_str());
+      pp_instance, file_system, path.c_str());
   if (!resource)
     return;  // CreateInfo default constructor initializes to 0.
   SerializeFileRef(resource, result);