Add CHECK on session start for profile construction

chrome/browser/profiles/profile_impl.cc

Index: chrome/browser/profiles/profile_impl.cc
diff --git a/chrome/browser/profiles/profile_impl.cc b/chrome/browser/profiles/profile_impl.cc
index 0e6340d54882e17307f2bf2a0251ccfcbf8fdbcb..b1cc6465bfe5cc3c23b506085005977c79ab7e20 100644
--- a/chrome/browser/profiles/profile_impl.cc
+++ b/chrome/browser/profiles/profile_impl.cc
@@ -17,6 +17,7 @@
 #include "base/environment.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
+#include "base/logging.h"
 #include "base/memory/ptr_util.h"
 #include "base/memory/weak_ptr.h"
 #include "base/metrics/histogram_macros.h"
@@ -128,9 +129,14 @@
 
 #if defined(OS_CHROMEOS)
 #include "chrome/browser/chromeos/locale_change_guard.h"
+#include "chrome/browser/chromeos/login/session/user_session_manager.h"
+#include "chrome/browser/chromeos/policy/user_cloud_policy_manager_chromeos.h"
+#include "chrome/browser/chromeos/policy/user_policy_manager_factory_chromeos.h"
 #include "chrome/browser/chromeos/preferences.h"
 #include "chrome/browser/chromeos/profiles/profile_helper.h"
 #include "chrome/browser/chromeos/settings/device_settings_service.h"
+#include "components/session_manager/core/session_manager.h"
+#include "components/user_manager/user.h"
 #include "components/user_manager/user_manager.h"
 #endif
 
@@ -138,11 +144,7 @@
 #include "chrome/browser/background/background_mode_manager.h"
 #endif
 
-#if defined(OS_CHROMEOS)
-#include "chrome/browser/chromeos/login/session/user_session_manager.h"
-#include "chrome/browser/chromeos/policy/user_cloud_policy_manager_chromeos.h"
-#include "chrome/browser/chromeos/policy/user_policy_manager_factory_chromeos.h"
-#else
+#if !defined(OS_CHROMEOS)
 #include "chrome/browser/policy/cloud/user_cloud_policy_manager_factory.h"
 #include "components/policy/core/common/cloud/user_cloud_policy_manager.h"
 #endif
@@ -424,6 +426,21 @@ ProfileImpl::ProfileImpl(
   DCHECK(!path.empty()) << "Using an empty path will attempt to write " <<
                             "profile files to the root directory!";
 
+#if defined(OS_CHROMEOS)
+  if (!chromeos::ProfileHelper::IsSigninProfile(this)) {
+    const user_manager::User* user =
+        chromeos::ProfileHelper::Get()->GetUserByProfile(this);
+    // A |User| instance should always exist for a profile which is not the
+    // initial or the sign-in profile.
+    CHECK(user);
+    LOG_IF(FATAL,
+           !session_manager::SessionManager::Get()->HasSessionForAccountId(
+               user->GetAccountId()))
+        << "Attempting to construct the profile before starting the user "
+           "session";
+  }
+#endif
+
 #if BUILDFLAG(ENABLE_SESSION_SERVICE)
   create_session_service_timer_.Start(FROM_HERE,
       TimeDelta::FromMilliseconds(kCreateSessionServiceDelayMS), this,