[chrome-gnome-shell] Disable update check for system extensions.

[Yuri Konotopov <ykonotopov src gnome org>]

commit 2aacd9587dd5b892e0b12cd22b19477448507661
Author: Yuri Konotopov <ykonotopov gmail com>
Date:   Fri Sep 23 20:03:54 2016 +0300

    Disable update check for system extensions.

 extension/include/constants.js |    6 ++++++
 extension/include/update.js    |    2 +-
 2 files changed, 7 insertions(+), 1 deletions(-)
---
diff --git a/extension/include/constants.js b/extension/include/constants.js
index 0afb333..96ae2ab 100644
--- a/extension/include/constants.js
+++ b/extension/include/constants.js
@@ -65,3 +65,9 @@ EXTENSION_STATE                       = {
        // should never be in a real extensionMeta object.
        UNINSTALLED:    99
 };
+
+// gnome-shell/js/misc/extensionUtils.js
+EXTENSION_TYPE                 = {
+    SYSTEM:            1,
+    PER_USER:  2
+};
diff --git a/extension/include/update.js b/extension/include/update.js
index 8a9885a..36fd788 100644
--- a/extension/include/update.js
+++ b/extension/include/update.js
@@ -45,7 +45,7 @@ GSC.update = (function($) {
 
                                                for (uuid in extensionsResponse.extensions)
                                                {
-                                                       if (GSC.isUUID(uuid))
+                                                       if (GSC.isUUID(uuid) && 
extensionsResponse.extensions[uuid].type == EXTENSION_TYPE.PER_USER)
                                                        {
                                                                request.installed[uuid] = {version: 
parseInt(extensionsResponse.extensions[uuid].version) || 1};
                                                        }