gdata: Remove a DCHECK that does not make sense.

chrome/browser/chromeos/gdata/gdata_file_system_proxy.cc

 // Copyright (c) 2012 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 "chrome/browser/chromeos/gdata/gdata_file_system_proxy.h"
 
 #include <string>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 230 matching lines @@
 
   callback.Run(base::PLATFORM_FILE_OK, file_info, file_path);
 }
 
 void GDataFileSystemProxy::OnReadDirectory(
     bool hide_hosted_documents,
     const FileSystemOperationInterface::ReadDirectoryCallback&
     callback,
     base::PlatformFileError error,
     scoped_ptr<gdata::GDataDirectoryProto> directory_proto) {
-  DCHECK(error != base::PLATFORM_FILE_OK);
-
   if (error != base::PLATFORM_FILE_OK) {
     callback.Run(error, std::vector<base::FileUtilProxy::Entry>(), false);
     return;
   }
   std::vector<base::FileUtilProxy::Entry> entries;
   // Convert gdata files to something File API stack can understand.
   for (int i = 0; i < directory_proto->child_directories_size(); ++i) {
     const GDataDirectoryProto& proto = directory_proto->child_directories(i);
     entries.push_back(
         GDataEntryProtoToFileUtilProxyEntry(proto.gdata_entry()));
   }
   for (int i = 0; i < directory_proto->child_files_size(); ++i) {
     const GDataFileProto& proto = directory_proto->child_files(i);
     if (hide_hosted_documents && proto.is_hosted_document())
         continue;
     entries.push_back(
         GDataEntryProtoToFileUtilProxyEntry(proto.gdata_entry()));
   }
 
   callback.Run(base::PLATFORM_FILE_OK, entries, false);
 }
 
 }  // namespace gdata