Use SNAPSHOT sync mode for LocalSync

chrome/browser/sync_file_system/local/local_file_sync_service.h

Index: chrome/browser/sync_file_system/local/local_file_sync_service.h
diff --git a/chrome/browser/sync_file_system/local/local_file_sync_service.h b/chrome/browser/sync_file_system/local/local_file_sync_service.h
index 7da29c64d391d1111b1b586ec2b7d7680e54b54e..b72f66e78c14db21d475d621669ce69e7ee3fc88 100644
--- a/chrome/browser/sync_file_system/local/local_file_sync_service.h
+++ b/chrome/browser/sync_file_system/local/local_file_sync_service.h
@@ -26,6 +26,10 @@ namespace fileapi {
 class FileSystemContext;
 }
 
+namespace webkit_blob {
+class ScopedFile;
+}
+
 namespace sync_file_system {
 
 class FileChange;
@@ -181,8 +185,10 @@ class LocalFileSyncService
   // Callbacks for ProcessLocalChange.
   void DidGetFileForLocalSync(
       SyncStatusCode status,
-      const LocalFileSyncInfo& sync_file_info);
+      const LocalFileSyncInfo& sync_file_info,
+      scoped_ptr<webkit_blob::ScopedFile> snapshot);
   void ProcessNextChangeForURL(
+      scoped_ptr<webkit_blob::ScopedFile> snapshot,
       const LocalFileSyncInfo& sync_file_info,
       const FileChange& last_change,
       const FileChangeList& changes,