Index: src/platform/update_engine/update_metadata.proto |
diff --git a/src/platform/update_engine/update_metadata.proto b/src/platform/update_engine/update_metadata.proto |
index 61b496513d8dfa69c8371d8aef337f5d2202c9e2..42880dae3b2062cb66ffb32b840c6a1cb1e652dc 100644 |
--- a/src/platform/update_engine/update_metadata.proto |
+++ b/src/platform/update_engine/update_metadata.proto |
@@ -102,6 +102,8 @@ message DeltaArchiveManifest { |
} |
// If present, there is data associated with this File object and |
// data_offset and data_size must be set. |
+ // If a file object doesn't have this set, it means the data is |
+ // unchanged from the old version of the file. |
optional DataFormat data_format = 4; |
// The offset into the delta file where the data (if any) is stored |
optional uint32 data_offset = 5; |