Fixing bad error return code in html5fs remove/unlink/rmdir.

native_client_sdk/src/libraries/nacl_io/html5fs/html5_fs.cc

Index: native_client_sdk/src/libraries/nacl_io/html5fs/html5_fs.cc
diff --git a/native_client_sdk/src/libraries/nacl_io/html5fs/html5_fs.cc b/native_client_sdk/src/libraries/nacl_io/html5fs/html5_fs.cc
index f744750e6e71087d04ab853fff17149570dedd7d..bb6b9cc87ed4f451f860377ab4d25aa1816555b6 100644
--- a/native_client_sdk/src/libraries/nacl_io/html5fs/html5_fs.cc
+++ b/native_client_sdk/src/libraries/nacl_io/html5fs/html5_fs.cc
@@ -155,6 +155,9 @@ Error Html5Fs::RemoveInternal(const Path& path, int remove_type) {
     int32_t query_result = file_ref_iface_->Query(
         fileref_resource.pp_resource(), &file_info, PP_BlockUntilComplete());
     if (query_result != PP_OK) {
+      if (query_result == PP_ERROR_FILENOTFOUND) {
+        return ENOENT;
+      }
       LOG_ERROR("Error querying file type");
       return EINVAL;
     }