Fix: pass linter

sync/compress-text.js

@@ -1,5 +1,5 @@
-/* global messageBox */
-/* global zip */
+/* global zip onDOMready */
+/* exported createZipFileFromText readZipFileFromBlob */
 'use strict';
 
 onDOMready().then(() => {

sync/cross-browser-functions.js

@@ -1,3 +1,4 @@
+/* exported getRedirectUrlAuthFlow launchWebAuthFlow */
 'use strict';
 
 /**

sync/import-export-dropbox.js

@@ -1,6 +1,6 @@
 /* global messageBox Dropbox createZipFileFromText readZipFileFromBlob
   launchWebAuthFlow getRedirectUrlAuthFlow importFromString resolve
-  $ $create t chromeLocal API */
+  $ $create t chromeLocal API getOwnTab */
 'use strict';
 
 const DROPBOX_API_KEY = 'zg52vphuapvpng9';