Implement the filesystem proxy. This allows the FileRef tests to pass in the...

ppapi/proxy/ppb_file_ref_proxy.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 "ppapi/proxy/ppb_file_ref_proxy.h"
 
 #include "ppapi/c/dev/ppb_file_ref_dev.h"
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/c/private/ppb_proxy_private.h"
 #include "ppapi/proxy/host_dispatcher.h"
@@ skipping 279 matching lines @@
       file_system.host_resource(), path.c_str());
   if (!resource)
     return;  // CreateInfo default constructor initializes to 0.
   SerializeFileRef(resource, result);
 }
 
 void PPB_FileRef_Proxy::OnMsgGetParent(const HostResource& host_resource,
                                        PPBFileRef_CreateInfo* result) {
   PP_Resource resource = ppb_file_ref_target()->GetParent(
       host_resource.host_resource());
-  if (!resource)
-    return;  // CreateInfo default constructor initializes to 0.
   SerializeFileRef(resource, result);
 }
 
 void PPB_FileRef_Proxy::OnMsgMakeDirectory(const HostResource& host_resource,
                                            PP_Bool make_ancestors,
                                            uint32_t serialized_callback) {
   PP_CompletionCallback callback = ReceiveCallback(serialized_callback);
   int32_t result =
       ppb_file_ref_target()->MakeDirectory(host_resource.host_resource(),
                                            make_ancestors, callback);
@@ skipping 29 matching lines @@
   int32_t result =
       ppb_file_ref_target()->Rename(file_ref.host_resource(),
                                     new_file_ref.host_resource(),
                                     callback);
   if (result != PP_ERROR_WOULDBLOCK)
     PP_RunCompletionCallback(&callback, result);
 }
 
 }  // namespace proxy
 }  // namespace pp