drive: Fills no-parent entiries in "/drive/other".

chrome/browser/chromeos/drive/drive_file_system.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/drive/drive_file_system.h"
 
 #include "base/bind.h"
 #include "base/file_util.h"
 #include "base/json/json_file_value_serializer.h"
 #include "base/message_loop_proxy.h"
@@ skipping 1072 matching lines @@
   DCHECK(!callback.is_null());
 
   if (error != DRIVE_FILE_OK) {
     callback.Run(error);
     return;
   }
   if (!entry_proto->file_info().is_directory()) {
     callback.Run(DRIVE_FILE_ERROR_NOT_A_DIRECTORY);
     return;
   }
+  if (util::IsSpecialResourceId(entry_proto->resource_id())) {
+    // Do not load special directories. Just return.
+    callback.Run(DRIVE_FILE_OK);
+    return;
+  }
 
   change_list_loader_->LoadDirectoryFromServer(
       entry_proto->resource_id(),
       callback);
 }
 
 void DriveFileSystem::UpdateFileByResourceId(
     const std::string& resource_id,
     const DriveClientContext& context,
     const FileOperationCallback& callback) {
@@ skipping 582 matching lines @@
     return;
   }
 
   PlatformFileInfoProto entry_file_info;
   util::ConvertPlatformFileInfoToProto(*file_info, &entry_file_info);
   *entry_proto->mutable_file_info() = entry_file_info;
   callback.Run(DRIVE_FILE_OK, entry_proto.Pass());
 }
 
 }  // namespace drive