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

chrome/browser/chromeos/login/login_browsertest.cc

 // Copyright (c) 2012 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 "base/command_line.h"
 #include "base/time.h"
 #include "chrome/browser/chromeos/cros/cros_in_process_browser_test.h"
 #include "chrome/browser/chromeos/cros/mock_cryptohome_library.h"
 #include "chrome/browser/chromeos/cros/mock_network_library.h"
 #include "chrome/browser/profiles/profile_manager.h"
@@ skipping 45 matching lines @@
     LoginTestBase::SetUpInProcessBrowserTestFixture();
   }
 
   virtual void SetUpCommandLine(CommandLine* command_line) {
     command_line->AppendSwitchASCII(switches::kLoginUser, "TestUser@gmail.com");
     command_line->AppendSwitchASCII(switches::kLoginProfile, "user");
     command_line->AppendSwitch(switches::kNoFirstRun);
   }
 };
 
-class LoginProfileTest : public LoginUserTest {
+class LoginGuestTest : public LoginTestBase {
  protected:
   virtual void SetUpCommandLine(CommandLine* command_line) {
+    command_line->AppendSwitch(switches::kGuestSession);
+    command_line->AppendSwitch(switches::kIncognito);
     command_line->AppendSwitchASCII(switches::kLoginProfile, "user");
     command_line->AppendSwitch(switches::kNoFirstRun);
   }
 };
 
 // After a chrome crash, the session manager will restart chrome with
 // the -login-user flag indicating that the user is already logged in.
 // This profile should NOT be an OTR profile.
 IN_PROC_BROWSER_TEST_F(LoginUserTest, UserPassed) {
   Profile* profile = browser()->profile();
   EXPECT_EQ("user", profile->GetPath().BaseName().value());
   EXPECT_FALSE(profile->IsOffTheRecord());
 }
 
-// On initial launch, we should get the OTR default profile.
-IN_PROC_BROWSER_TEST_F(LoginProfileTest, UserNotPassed) {
+// After a guest login, we should get the OTR default profile.
+IN_PROC_BROWSER_TEST_F(LoginGuestTest, GuestIsOTR) {
   Profile* profile = browser()->profile();
   EXPECT_EQ("Default", profile->GetPath().BaseName().value());
   EXPECT_TRUE(profile->IsOffTheRecord());
   // Ensure there's extension service for this profile.
   EXPECT_TRUE(profile->GetExtensionService());
 }
 
 } // namespace chromeos