Revert of Extract LoginPerformer to chromeos/auth

chromeos/login/auth/mock_authenticator.cc

Index: chromeos/login/auth/mock_authenticator.cc
diff --git a/chromeos/login/auth/mock_authenticator.cc b/chromeos/login/auth/mock_authenticator.cc
index 0665156f316c7f2e2fa53624b3dc5c1e25521f3f..e457f9f6d971ca9a72efba265249a27dfce0c6fb 100644
--- a/chromeos/login/auth/mock_authenticator.cc
+++ b/chromeos/login/auth/mock_authenticator.cc
@@ -17,14 +17,14 @@
       message_loop_(base::MessageLoopProxy::current()) {
 }
 
-void MockAuthenticator::CompleteLogin(content::BrowserContext* ignored,
+void MockAuthenticator::CompleteLogin(Profile* profile,
                                       const UserContext& user_context) {
   if (expected_user_context_ != user_context)
     NOTREACHED();
   OnAuthSuccess();
 }
 
-void MockAuthenticator::AuthenticateToLogin(content::BrowserContext* ignored,
+void MockAuthenticator::AuthenticateToLogin(Profile* profile,
                                             const UserContext& user_context) {
   if (user_context == expected_user_context_) {
     message_loop_->PostTask(