gdata: Get rid of callback from GDataDirectoryService::FindEntryByPath()

chrome/browser/chromeos/gdata/gdata_file_system.h

 // 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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_GDATA_GDATA_FILE_SYSTEM_H_
 #define CHROME_BROWSER_CHROMEOS_GDATA_GDATA_FILE_SYSTEM_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 157 matching lines @@
   typedef base::Callback<void(GetDocumentsParams* params,
                               GDataFileError error)>
       LoadDocumentFeedCallback;
 
   // Struct used to record UMA stats with FeedToFileResourceMap().
   struct FeedToFileResourceMapUmaStats;
 
   // Struct used for StartFileUploadOnUIThread().
   struct StartFileUploadParams;
 
-  // Finds entry object by |file_path| and returns the entry object.
-  // Returns NULL if it does not find the entry.
-  GDataEntry* GetGDataEntryByPath(const FilePath& file_path);
-
   // Callback passed to |LoadFeedFromServer| from |Search| method.
   // |callback| is that should be run with data received from
   // |LoadFeedFromServer|.
   // |params| params used for getting document feed for content search.
   // |error| error code returned by |LoadFeedFromServer|.
   void OnSearch(const SearchCallback& callback,
                 GetDocumentsParams* params,
                 GDataFileError error);
 
   // Part of TransferFileFromLocalToRemote(). Called after
@@ skipping 721 matching lines @@
   base::WeakPtr<GDataFileSystem> ui_weak_ptr_;
 
   ObserverList<Observer> observers_;
 
   scoped_refptr<base::SequencedTaskRunner> blocking_task_runner_;
 };
 
 }  // namespace gdata
 
 #endif  // CHROME_BROWSER_CHROMEOS_GDATA_GDATA_FILE_SYSTEM_H_