Reimplement MoveOperation.

chrome/browser/chromeos/drive/resource_metadata.cc

Index: chrome/browser/chromeos/drive/resource_metadata.cc
diff --git a/chrome/browser/chromeos/drive/resource_metadata.cc b/chrome/browser/chromeos/drive/resource_metadata.cc
index 0b1b6e9c4c6a45b0caf04f64056ae97fea2be993..e6972bf67fbcbce282a04a2bf3c993a6b5159d4f 100644
--- a/chrome/browser/chromeos/drive/resource_metadata.cc
+++ b/chrome/browser/chromeos/drive/resource_metadata.cc
@@ -447,12 +447,14 @@ FileError ResourceMetadata::RefreshEntry(const ResourceEntry& entry) {
       entry.file_info().is_directory())
     return FILE_ERROR_INVALID_OPERATION;
 
-  // Update data.
+  // Make sure that the new parent exists and it is a directory.
   ResourceEntry new_parent;
-  if (!storage_->GetEntry(entry.parent_local_id(), &new_parent) ||
-      !new_parent.file_info().is_directory())
+  if (!storage_->GetEntry(entry.parent_local_id(), &new_parent))
     return FILE_ERROR_NOT_FOUND;
 
+  if (!new_parent.file_info().is_directory())
+    return FILE_ERROR_NOT_A_DIRECTORY;
+
   // Remove from the old parent and add it to the new parent with the new data.
   if (!PutEntryUnderDirectory(entry))
     return FILE_ERROR_FAILED;