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

chrome/browser/chromeos/gdata/gdata_files.h

Index: chrome/browser/chromeos/gdata/gdata_files.h
diff --git a/chrome/browser/chromeos/gdata/gdata_files.h b/chrome/browser/chromeos/gdata/gdata_files.h
index 78ef14ccd78cd5e082dcf8c7ca841fb079d3bf0d..dac845dd76088c07621a649767bb60c432cd11a6 100644
--- a/chrome/browser/chromeos/gdata/gdata_files.h
+++ b/chrome/browser/chromeos/gdata/gdata_files.h
@@ -358,9 +358,9 @@ class GDataDirectoryService {
   // Removes the entry from resource map.
   void RemoveEntryFromResourceMap(GDataEntry* entry);
 
-  // Searches for |file_path| triggering callback.
-  void FindEntryByPath(const FilePath& file_path,
-                       const FindEntryCallback& callback);
+  // Searches for |file_path| synchronously.
+  // TODO(satorux): Replace this with an async version crbug.com/137160
+  GDataEntry* FindEntryByPathSync(const FilePath& file_path);
 
   // Returns the GDataEntry* with the corresponding |resource_id|.
   // TODO(achuith): Get rid of this in favor of async version crbug.com/13957.