Revert of Start session fail causes restart chrome

chromeos/dbus/fake_session_manager_client.cc

Index: chromeos/dbus/fake_session_manager_client.cc
diff --git a/chromeos/dbus/fake_session_manager_client.cc b/chromeos/dbus/fake_session_manager_client.cc
index 21f50c6a37b0823a7f7dc2641596eed258d42a24..306ade59bb9f3b10c736b9f0a491593205535d31 100644
--- a/chromeos/dbus/fake_session_manager_client.cc
+++ b/chromeos/dbus/fake_session_manager_client.cc
@@ -46,14 +46,11 @@
                                           const std::string& command_line) {
 }
 
-void FakeSessionManagerClient::StartSession(
-    const std::string& user_email,
-    const StartSessionCallback& callback) {
+void FakeSessionManagerClient::StartSession(const std::string& user_email) {
   DCHECK_EQ(0UL, user_sessions_.count(user_email));
   std::string user_id_hash =
       CryptohomeClient::GetStubSanitizedUsername(user_email);
   user_sessions_[user_email] = user_id_hash;
-  base::MessageLoop::current()->PostTask(FROM_HERE, base::Bind(callback, true));
 }
 
 void FakeSessionManagerClient::StopSession() {