[SyncFS] Make GetOriginStatusMap asynchronous

chrome/browser/sync_file_system/remote_file_sync_service.h

Index: chrome/browser/sync_file_system/remote_file_sync_service.h
diff --git a/chrome/browser/sync_file_system/remote_file_sync_service.h b/chrome/browser/sync_file_system/remote_file_sync_service.h
index 8a310548f4c6f122c828809ab80bb3c360d5913d..0dfc7386d5bb80d97fe7a43c04dfc536271dabb9 100644
--- a/chrome/browser/sync_file_system/remote_file_sync_service.h
+++ b/chrome/browser/sync_file_system/remote_file_sync_service.h
@@ -111,17 +111,16 @@ class RemoteFileSyncService {
 
   // For GetOriginStatusMap.
   typedef std::map<GURL, std::string> OriginStatusMap;
+  typedef base::Callback<void(const OriginStatusMap&)> StatusMapCallback;
 
   // For GetRemoteVersions.
-  typedef base::Callback<void(SyncStatusCode status,
-                              const std::vector<Version>& versions)>
+  typedef base::Callback<void(SyncStatusCode, const std::vector<Version>&)>
       RemoteVersionsCallback;
-  typedef base::Callback<void(SyncStatusCode status,
-                              webkit_blob::ScopedFile downloaded)>
+  typedef base::Callback<void(SyncStatusCode, webkit_blob::ScopedFile)>

[tzik, 2014/05/21 10:52:33]

please keep these parameter names

       DownloadVersionCallback;
 
   // For DumpFile.
-  typedef base::Callback<void(scoped_ptr<base::ListValue> list)> ListCallback;
+  typedef base::Callback<void(scoped_ptr<base::ListValue>)> ListCallback;
 
   // Creates an initialized RemoteFileSyncService for backend |version|
   // for |context|.
@@ -192,7 +191,7 @@ class RemoteFileSyncService {
 
   // Returns all origins along with an arbitrary string description of their
   // corresponding sync statuses.
-  virtual void GetOriginStatusMap(OriginStatusMap* status_map) = 0;
+  virtual void GetOriginStatusMap(const StatusMapCallback& callback) = 0;
 
   // Returns file metadata for |origin| to call |callback|.
   virtual void DumpFiles(const GURL& origin,