Rolling back admin check for domain replacement logic.

multiple-domain/MultipleDomain.php

@@ -335,10 +335,6 @@ public function scripts($hook)
      */
     public function replaceDomain($url)
     {
-        if (!$this->shouldReplaceDomain()) {
-            return $url;
-        }
-
         if (array_key_exists($this->domain, $this->domains) && !preg_match('/\/wp-admin\/?/', $url)) {
             $domain = $this->getDomainFromUrl($url);
             $url = str_replace($domain, $this->domain, $url);
@@ -723,28 +719,4 @@ private function outputHrefLangHeader($url, $lang = 'x-default')
         $lang = str_replace('_', '-', $lang);
         printf('<link rel="alternate" href="%s" hreflang="%s"/>', $url, $lang);
     }
-
-    /**
-     * Checks whether a domain replacement should be made.
-     *
-     * @return bool
-     * @since  0.8.5
-     */
-    private function shouldReplaceDomain()
-    {
-        if (is_admin()) {
-            return false;
-        }
-
-        /*
-         * `is_admin` returns `false` for `wp-login.php` page. We need to do a
-         * manual check, then.
-         */
-        $path = str_replace([ '\\', '/' ], DIRECTORY_SEPARATOR, ABSPATH);
-        $includedFiles = get_included_files();
-        $isLogin = in_array($path . 'wp-login.php', $includedFiles)
-            || in_array($path . 'wp-register.php', $includedFiles);
-
-        return !$isLogin;
-    }
 }