ChromeOS OOBE: Fix EULA Back button.

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

Index: chrome/browser/resources/chromeos/login/oobe_dialog.js
diff --git a/chrome/browser/resources/chromeos/login/oobe_dialog.js b/chrome/browser/resources/chromeos/login/oobe_dialog.js
index ab3be0620f8b3505afc2cb202b6953ee4c75f553..fc5ad21f78e19a436e2b3bd8ac360143e7c15df5 100644
--- a/chrome/browser/resources/chromeos/login/oobe_dialog.js
+++ b/chrome/browser/resources/chromeos/login/oobe_dialog.js
@@ -24,7 +24,15 @@ Polymer({
     },
   },
 
-  focus: function() {},
+  focus: function() {
+    /* When Network Selection Dialog is shown because user pressed "Back"
+       button on EULA screen, display_manager does not inform this dialog that
+       it is shown. It ouly focuses this dialog.
+       So this emulates show().
+       TODO (alemate): fix this once event flow is updated.
+    */
+    this.show();
+  },
 
   /**
     * This is called from oobe_welcome when this dialog is shown.