Remove previous hacky way of guessing isLoggedIn

- Remove reference to `drive.uo.curvePublic` (f8442e9b98)
- Add `common` information to `data` when sent to `make-backup.js`

www/common/drive-ui.js

@@ -4742,6 +4742,7 @@ define([
                 data.sharedFolderId = sfId;
                 data.name = Util.fixFileName(folderName);
                 data.folderName = Util.fixFileName(folderName) + '.zip';
+                data.common = common;
 
                 var uo = manager.user.userObject;
                 if (sfId && manager.folders[sfId]) {

www/common/make-backup.js

@@ -348,17 +348,14 @@ define([
             max: 0,
             done: 0,
             cache: cache,
-            sframeChan: sframeChan
+            sframeChan: sframeChan,
+            common: data.common,
         };
         var filesData = data.sharedFolderId && ctx.sf[data.sharedFolderId] ? ctx.sf[data.sharedFolderId].filesData : ctx.data.filesData;
         var links = ctx.sf[data.sharedFolderId] && ctx.sf[data.sharedFolderId].static ? ctx.data.static && ctx.sf[data.sharedFolderId].static : ctx.data.static;
 
-        if (!data.uo.curvePublic && Object.keys(ctx.data.root).length === 0) {
+        if (ctx.common && !ctx.common.isLoggedIn()) {
             // Anonymous Drive
-            // In anonymous drive, there are no root folder in the data
-            // We are going to emulate it
-            // One false positive: empty team drive but the result is
-            // functionally equivalent
             console.log("Anonymous drive"); // XXX: remove after testing phase
             ctx.data.root = {};
             let index = 0;

www/settings/inner.js

@@ -1196,6 +1196,7 @@ define([
             Feedback.send('FULL_DRIVE_EXPORT_START');
             var todo = function(data, filename) {
                 var ui = Backup.createExportUI(privateData.origin);
+                data.common = common;
 
                 var bu = Backup.create(data, common.getPad, privateData.fileHost, function(blob, errors) {
                     saveAs(blob, filename);