Merge pull request #586 from jitsi/inline_not_supported

feat(SS): handle inline installation not supported error.

modules/RTC/ScreenObtainer.js

     = 'Installs can only be initiated by one of'
         + ' the Chrome Web Store item\'s verified sites.';
 
+/**
+ * The error returned by chrome when trying to start inline installation
+ * with extension that doesn't support inline installation.
+ *
+ * @type {string}
+ */
+const CHROME_EXTENSION_INLINE_NOT_SUPPORTED_ERROR
+    = 'Inline installation is not supported for this item. '
+        + 'The user will be redirected to the Chrome Web Store.';
+
 /**
  * The error message returned by chrome when the extension is installed.
  */
 
         if ((CHROME_EXTENSION_POPUP_ERROR === e
              || CHROME_EXTENSION_IFRAME_ERROR === e
-             || CHROME_EXTENSION_INLINE_ERROR === e)
+             || CHROME_EXTENSION_INLINE_ERROR === e
+             || CHROME_EXTENSION_INLINE_NOT_SUPPORTED_ERROR === e)
                 && options.interval > 0
                 && typeof options.checkAgain === 'function'
                 && typeof options.listener === 'function') {