[cros] Error bubble on login is displayed to the left of Gaia frame.

chrome/browser/resources/chromeos/login/screen_gaia_signin.css

Index: chrome/browser/resources/chromeos/login/screen_gaia_signin.css
diff --git a/chrome/browser/resources/chromeos/login/screen_gaia_signin.css b/chrome/browser/resources/chromeos/login/screen_gaia_signin.css
index 04dba0266f83c72fb0491a8115fc3b17d74c68ea..8cb31d3fdbe07c8189e0bfbdcca2ba9f707ee395 100644
--- a/chrome/browser/resources/chromeos/login/screen_gaia_signin.css
+++ b/chrome/browser/resources/chromeos/login/screen_gaia_signin.css
@@ -61,3 +61,12 @@ html[dir=rtl] #signin-right {
   right: 0;
   top: 0;
 }
+
+/* Position to be aligned with the login box in iframe  */
+#login-box {
+  position: absolute;
+  top: 77px;
+  visibility: hidden;
+  width: 32px;
+  z-index: -1;
+}