drive: Always use last_modified stored in ResourceEntry

chrome/browser/chromeos/drive/resource_entry_conversion.cc

Index: chrome/browser/chromeos/drive/resource_entry_conversion.cc
diff --git a/chrome/browser/chromeos/drive/resource_entry_conversion.cc b/chrome/browser/chromeos/drive/resource_entry_conversion.cc
index 1974c70c3a4e62b3d9b968e9ac8cfa2e8bb0b190..f4de8e82054c2a00e77913560c3754a7177e2c3f 100644
--- a/chrome/browser/chromeos/drive/resource_entry_conversion.cc
+++ b/chrome/browser/chromeos/drive/resource_entry_conversion.cc
@@ -146,15 +146,4 @@ void ConvertResourceEntryToFileInfo(const ResourceEntry& entry,
       entry.file_info().creation_time());
 }
 
-void SetPlatformFileInfoToResourceEntry(const base::File::Info& file_info,
-                                        ResourceEntry* entry) {
-  PlatformFileInfoProto* entry_file_info = entry->mutable_file_info();
-  entry_file_info->set_size(file_info.size);
-  entry_file_info->set_is_directory(file_info.is_directory);
-  entry_file_info->set_is_symbolic_link(file_info.is_symbolic_link);
-  entry_file_info->set_last_modified(file_info.last_modified.ToInternalValue());
-  entry_file_info->set_last_accessed(file_info.last_accessed.ToInternalValue());
-  entry_file_info->set_creation_time(file_info.creation_time.ToInternalValue());
-}
-
 }  // namespace drive