Add disable flag around supervised user import code.

chrome/browser/ui/webui/options/manage_profile_browsertest.js

Index: chrome/browser/ui/webui/options/manage_profile_browsertest.js
diff --git a/chrome/browser/ui/webui/options/manage_profile_browsertest.js b/chrome/browser/ui/webui/options/manage_profile_browsertest.js
index 3ba7cad2ebdd4ee775e9219c0ca86601944eb76c..950d1b8e21d7d28e5aad305d051acacca03155a7 100644
--- a/chrome/browser/ui/webui/options/manage_profile_browsertest.js
+++ b/chrome/browser/ui/webui/options/manage_profile_browsertest.js
@@ -5,9 +5,6 @@
 // None of these tests is relevant for Chrome OS.
 GEN('#if !defined(OS_CHROMEOS)');
 
-GEN('#include "base/command_line.h"');
-GEN('#include "chrome/common/chrome_switches.h"');
-
 /**
  * TestFixture for ManageProfileOverlay and CreateProfileOverlay WebUI testing.
  * @extends {testing.Test}
@@ -28,12 +25,6 @@ ManageProfileUITest.prototype = {
    */
   runAccessibilityChecks: false,
 
-  /** @override */
-  testGenPreamble: function() {
-    GEN('CommandLine::ForCurrentProcess()->' +
-        'AppendSwitch(switches::kAllowCreateExistingManagedUsers);');
-  },
-
   /**
    * Returns a test profile-info object with configurable "managed" status.
    * @param {boolean} managed If true, the test profile will be marked as