[NaCl SDK] nacl_io html5fs: Malformed file paths set errno to ENOENT.

native_client_sdk/src/libraries/nacl_io/mount_html5fs.cc

Index: native_client_sdk/src/libraries/nacl_io/mount_html5fs.cc
diff --git a/native_client_sdk/src/libraries/nacl_io/mount_html5fs.cc b/native_client_sdk/src/libraries/nacl_io/mount_html5fs.cc
index 0008284253ace3c0c99b10b4be20b67622794ed8..328643a2435514cd6d441e52b90f1283623841f0 100644
--- a/native_client_sdk/src/libraries/nacl_io/mount_html5fs.cc
+++ b/native_client_sdk/src/libraries/nacl_io/mount_html5fs.cc
@@ -34,7 +34,7 @@ Error MountHtml5Fs::Open(const Path& path, int mode, MountNode** out_node) {
   PP_Resource fileref = ppapi()->GetFileRefInterface()
       ->Create(filesystem_resource_, path.Join().c_str());
   if (!fileref)
-    return ENOSYS;
+    return ENOENT;
 
   MountNodeHtml5Fs* node = new MountNodeHtml5Fs(this, fileref);
   error = node->Init(mode);
@@ -59,7 +59,7 @@ Error MountHtml5Fs::Mkdir(const Path& path, int permissions) {
       ppapi()->GetFileRefInterface()->Create(filesystem_resource_,
                                              path.Join().c_str()));
   if (!fileref_resource.pp_resource())
-    return EIO;
+    return ENOENT;
 
   int32_t result = ppapi()->GetFileRefInterface()->MakeDirectory(
       fileref_resource.pp_resource(), PP_FALSE, PP_BlockUntilComplete());
@@ -81,7 +81,7 @@ Error MountHtml5Fs::Remove(const Path& path) {
       ppapi()->GetFileRefInterface()->Create(filesystem_resource_,
                                              path.Join().c_str()));
   if (!fileref_resource.pp_resource())
-    return ENOSYS;
+    return ENOENT;
 
   int32_t result = ppapi()->GetFileRefInterface()
       ->Delete(fileref_resource.pp_resource(), PP_BlockUntilComplete());