gdata: Introduce GDataWapiFeedLoader class

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 1298447ef8f890e04f0a85718146c42d9a64270c..37b722edd51b3c12073727ee33f48510c4d59c9c 100644
--- a/chrome/browser/chromeos/gdata/gdata_files.h
+++ b/chrome/browser/chromeos/gdata/gdata_files.h
@@ -379,6 +379,11 @@ class GDataDirectoryService {
   // TODO(satorux): Replace this with an async version crbug.com/137160
   GDataEntry* FindEntryByPathSync(const FilePath& file_path);
 
+  // Searches for |file_path| synchronously, and runs |callback|.
+  // TODO(satorux): Replace this with an async version crbug.com/137160
+  void FindEntryByPathAndRunSync(const FilePath& file_path,
+                                 const FindEntryCallback& callback);
+
   // Returns the GDataEntry* with the corresponding |resource_id|.
   // TODO(achuith): Get rid of this in favor of async version crbug.com/13957.
   GDataEntry* GetEntryByResourceId(const std::string& resource_id);