Revert 150436 - gdata: Remove hide_hosted_documents from ReadDirectoryCallback

chrome/browser/chromeos/gdata/gdata_file_system_unittest.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 <string>
 #include <vector>
 
 #include "base/bind.h"
 #include "base/file_path.h"
 #include "base/file_util.h"
@@ skipping 785 matching lines @@
 
     virtual void GetEntryInfoCallback(
         GDataFileError error,
         scoped_ptr<GDataEntryProto> entry_proto) {
       last_error_ = error;
       entry_proto_ = entry_proto.Pass();
     }
 
     virtual void ReadDirectoryCallback(
         GDataFileError error,
+        bool /* hide_hosted_documents */,
         scoped_ptr<GDataEntryProtoVector> entries) {
       last_error_ = error;
       directory_entries_ = entries.Pass();
     }
 
     GDataFileError last_error_;
     FilePath download_path_;
     FilePath opened_file_path_;
     std::string mime_type_;
     GDataFileType file_type_;
@@ skipping 1801 matching lines @@
 
   // Try to close the same file twice.
   file_system_->CloseFile(kFileInRoot, close_file_callback);
   message_loop_.Run();
 
   // It must fail.
   EXPECT_EQ(GDATA_FILE_ERROR_NOT_FOUND, callback_helper_->last_error_);
 }
 
 }   // namespace gdata