Index: chrome/browser/android/webapk/webapk.proto |
diff --git a/chrome/browser/android/webapk/webapk.proto b/chrome/browser/android/webapk/webapk.proto |
index b53e1a3253971c6ae75c0d5b8395c919420b36bc..27fc96b0842a89ebad031e709b97ba27c5b6126d 100644 |
--- a/chrome/browser/android/webapk/webapk.proto |
+++ b/chrome/browser/android/webapk/webapk.proto |
@@ -16,7 +16,11 @@ message WebApkResponse { |
// Version code of the WebAPK. |
optional string version = 2; |
- // URL to download WebAPK. |
+ // URL to download WebAPK. If the URL is empty, the client should not attempt |
+ // to download or install anything. For example, this may be empty when the |
+ // client requests an update even though no content has changed. The WebAPK |
+ // server can then let the client know that it is up-to-date already and does |
+ // not need to spend bandwidth re-downloading a WebAPK it has. |
optional string signed_download_url = 3; |
// Unique id identifying session with WebAPK server. |