Index: src/wp-includes/vars.php
===================================================================
--- src/wp-includes/vars.php	(revision 25653)
+++ src/wp-includes/vars.php	(working copy)
@@ -52,7 +52,15 @@
 		$is_lynx = true;
 	} elseif ( stripos($_SERVER['HTTP_USER_AGENT'], 'chrome') !== false ) {
 		if ( stripos( $_SERVER['HTTP_USER_AGENT'], 'chromeframe' ) !== false ) {
-			if ( $is_chrome = apply_filters( 'use_google_chrome_frame', is_admin() ) )
+                        $is_admin = is_admin();
+                        /**
+                         * Filter whether to use google chrome frame.
+                         *
+                         * @since 3.2.1
+                         *
+                         * @param bool $is_admin If the Dashboard or the administration panel is attempting to be displayed.
+                         */
+                        if ( $is_chrome = apply_filters( 'use_google_chrome_frame', $is_admin ) )
 				header( 'X-UA-Compatible: chrome=1' );
 			$is_winIE = ! $is_chrome;
 		} else {