UserPolicyCache only becomes ready after policy has been fetched.

chrome/test/base/testing_browser_process.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/test/base/testing_browser_process.h"
 
 #include "base/string_util.h"
 #include "chrome/browser/google/google_url_tracker.h"
 #include "chrome/browser/notifications/notification_ui_manager.h"
 #include "chrome/browser/policy/browser_policy_connector.h"
@@ skipping 256 matching lines @@
   google_url_tracker_.reset(google_url_tracker);
 }
 
 void TestingBrowserProcess::SetIOThread(IOThread* io_thread) {
   io_thread_ = io_thread;
 }
 
 void TestingBrowserProcess::SetDevToolsManager(DevToolsManager* manager) {
   devtools_manager_.reset(manager);
 }
+
+void TestingBrowserProcess::SetBrowserPolicyConnector(
+    policy::BrowserPolicyConnector* connector) {
+  browser_policy_connector_.reset(connector);
+}