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

chrome/browser/resources/chromeos/login/header_bar.js

Index: chrome/browser/resources/chromeos/login/header_bar.js
diff --git a/chrome/browser/resources/chromeos/login/header_bar.js b/chrome/browser/resources/chromeos/login/header_bar.js
index 871bdd04c5245c580a13dc8b8a494300f87c70de..19e973dfc55c87821abc3b09e411733664554f20 100644
--- a/chrome/browser/resources/chromeos/login/header_bar.js
+++ b/chrome/browser/resources/chromeos/login/header_bar.js
@@ -90,8 +90,12 @@ cr.define('login', function() {
     if (state != NET_STATE.OFFLINE) {
       Oobe.showSigninUI();
     } else {
-      $('bubble').showTextForElement($('add-user-button'),
-          localStrings.getString('addUserErrorMessage'));
+      const BUBBLE_OFFSET = 8;
+      const BUBBLE_PADDING = 5;
+      $('bubble').showTextForElement(
+          $('add-user-button'),
+          localStrings.getString('addUserErrorMessage'),
+          cr.ui.Bubble.Attachment.BOTTOM, BUBBLE_OFFSET, BUBBLE_PADDING);
       chrome.send('loginAddNetworkStateObserver',
                   ['login.HeaderBar.bubbleWatchdog']);
     }