ChromeOS: properly enable multiprofile mode in LoginManagerTest.

chrome/browser/chromeos/login/login_manager_test.cc

 // Copyright 2013 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/browser/chromeos/login/login_manager_test.h"
 
 #include "base/prefs/scoped_user_pref_update.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/chromeos/login/existing_user_controller.h"
@@ skipping 19 matching lines @@
 void LoginManagerTest::CleanUpOnMainThread() {
   if (LoginDisplayHostImpl::default_host())
     LoginDisplayHostImpl::default_host()->Finalize();
   base::MessageLoop::current()->RunUntilIdle();
 }
 
 void LoginManagerTest::SetUpCommandLine(CommandLine* command_line) {
   command_line->AppendSwitch(chromeos::switches::kLoginManager);
   command_line->AppendSwitch(chromeos::switches::kForceLoginManagerInTests);
   command_line->AppendSwitch(::switches::kMultiProfiles);
+  command_line->AppendSwitchASCII(::switches::kForceFieldTrials,
+                                  "ChromeOSUseMultiProfiles/Enable/");
 }
 
 void LoginManagerTest::SetUpInProcessBrowserTestFixture() {
   mock_login_utils_ = new testing::NiceMock<MockLoginUtils>();
   mock_login_utils_->DelegateToFake();
   mock_login_utils_->GetFakeLoginUtils()->set_should_launch_browser(
       should_launch_browser_);
   LoginUtils::Set(mock_login_utils_);
 }
 
@@ skipping 68 matching lines @@
     LoginDisplayHost* host = LoginDisplayHostImpl::default_host();
     EXPECT_TRUE(host != NULL);
 
     content::WebContents* web_contents =
         host->GetWebUILoginView()->GetWebContents();
     EXPECT_TRUE(web_contents != NULL);
     set_web_contents(web_contents);
   }
 
 }  // namespace chromeos