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

chrome/browser/chromeos/gdata/gdata_file_system.h

Index: chrome/browser/chromeos/gdata/gdata_file_system.h
diff --git a/chrome/browser/chromeos/gdata/gdata_file_system.h b/chrome/browser/chromeos/gdata/gdata_file_system.h
index 8b69845df7b09110227f3cc21db0313bb6b6b7ab..9edd41ad29aa8d1a7dc1908140cd5e51ad5ada08 100644
--- a/chrome/browser/chromeos/gdata/gdata_file_system.h
+++ b/chrome/browser/chromeos/gdata/gdata_file_system.h
@@ -175,10 +175,6 @@ class GDataFileSystem : public GDataFileSystemInterface,
   // 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|.