[cros] Fake a stub user login when no --login-manager and --login-user are given.

chrome/test/ui/ui_test.cc

Index: chrome/test/ui/ui_test.cc
diff --git a/chrome/test/ui/ui_test.cc b/chrome/test/ui/ui_test.cc
index f5eae5abbff2eb06acfc78e0e6cad0ddbfd25276..be708eaee28a8ac3c595e8803483a912dc82f3ca 100644
--- a/chrome/test/ui/ui_test.cc
+++ b/chrome/test/ui/ui_test.cc
@@ -46,6 +46,7 @@
 #include "chrome/test/automation/tab_proxy.h"
 #include "chrome/test/automation/window_proxy.h"
 #include "chrome/test/base/chrome_process_util.h"
+#include "chrome/test/base/testing_profile.h"
 #include "chrome/test/base/test_switches.h"
 #include "content/common/debug_flags.h"
 #include "googleurl/src/gurl.h"
@@ -584,7 +585,7 @@ DictionaryValue* UITest::GetLocalState() {
 DictionaryValue* UITest::GetDefaultProfilePreferences() {
   FilePath path;
   PathService::Get(chrome::DIR_USER_DATA, &path);
-  path = path.AppendASCII(chrome::kInitialProfile);
+  path = path.AppendASCII(TestingProfile::kTestUserProfileDir);
   return LoadDictionaryValueFromPath(path.Append(chrome::kPreferencesFilename));
 }