I see a bunch of "Loading content for a profile without session restore?" warnings in the Chrome user log when I boot a ToT cyan device:

[start of log]
[17067:17067:1007/141911:VERBOSE1:instance_holder.h(52)] Instance for arc::mojom::NetInstance::WifiEnabledStateChanged not available.
[17067:17067:1007/141911:VERBOSE1:input_events_blocker.cc(15)] InputEventsBlocker 0x23bb1468ecc0 created.
[17067:17067:1007/141911:VERBOSE1:user_session_manager.cc(663)] RespectLocalePreference: app_locale='en-US', bkup_locale='en-US', account_locale - unused.  Selected 'en-US'
[17067:17067:1007/141911:WARNING:merge_session_throttling_utils.cc(138)] Loading content for a profile without session restore?
[17067:17067:1007/141911:WARNING:merge_session_throttling_utils.cc(138)] Loading content for a profile without session restore?
[17067:17067:1007/141911:ERROR:component_loader.cc(154)] Failed to parse extension manifest.
[17067:17067:1007/141911:WARNING:merge_session_throttling_utils.cc(138)] Loading content for a profile without session restore?
[17067:17067:1007/141911:WARNING:merge_session_throttling_utils.cc(138)] Loading content for a profile without session restore?
[17067:17067:1007/141911:WARNING:merge_session_throttling_utils.cc(138)] Loading content for a profile without session restore?
[17067:17067:1007/141911:WARNING:merge_session_throttling_utils.cc(138)] Loading content for a profile without session restore?
[17067:17067:1007/141911:WARNING:merge_session_throttling_utils.cc(138)] Loading content for a profile without session restore?
[17067:17067:1007/141911:WARNING:merge_session_throttling_utils.cc(138)] Loading content for a profile without session restore?
[17067:17067:1007/141911:WARNING:merge_session_throttling_utils.cc(138)] Loading content for a profile without session restore?
[17067:17067:1007/141911:WARNING:merge_session_throttling_utils.cc(138)] Loading content for a profile without session restore?
[17067:17067:1007/141911:WARNING:merge_session_throttling_utils.cc(138)] Loading content for a profile without session restore?
[17067:17067:1007/141911:WARNING:merge_session_throttling_utils.cc(138)] Loading content for a profile without session restore?
[17067:17067:1007/141911:WARNING:merge_session_throttling_utils.cc(138)] Loading content for a profile without session restore?
[17067:17067:1007/141911:WARNING:merge_session_throttling_utils.cc(138)] Loading content for a profile without session restore?
[17067:17067:1007/141911:WARNING:merge_session_throttling_utils.cc(138)] Loading content for a profile without session restore?
[17067:17067:1007/141911:WARNING:merge_session_throttling_utils.cc(138)] Loading content for a profile without session restore?
[17067:17067:1007/141911:WARNING:merge_session_throttling_utils.cc(138)] Loading content for a profile without session restore?
[17067:17067:1007/141911:WARNING:merge_session_throttling_utils.cc(138)] Loading content for a profile without session restore?
[17067:17067:1007/141911:WARNING:merge_session_throttling_utils.cc(138)] Loading content for a profile without session restore?
[17067:17067:1007/141911:WARNING:merge_session_throttling_utils.cc(138)] Loading content for a profile without session restore?
[17067:17067:1007/141911:VERBOSE1:user_image_manager_impl.cc(876)] Profile image initialized from disk.
[17067:17067:1007/141911:VERBOSE1:input_events_blocker.cc(20)] InputEventsBlocker 0x23bb1468ecc0 destroyed.
[17067:17067:1007/141911:VERBOSE1:oauth2_login_manager.cc(106)] Loading OAuth2 refresh token from database.

---

Here's the relevant code from chrome/browser/chromeos/login/signin/merge_session_throttling_utils.cc:

bool ShouldDelayRequestForProfile(Profile* profile) {
...
  switch (login_manager->state()) {
    case chromeos::OAuth2LoginManager::SESSION_RESTORE_NOT_STARTED:
      // The session restore for this profile hasn't even started yet. Don't
      // block for now.
      // In theory this should not happen since we should
      // kick off the session restore process for the newly added profile
      // before we attempt loading any page.
      if (user_manager::UserManager::Get()->IsLoggedInAsUserWithGaiaAccount() &&
          !user_manager::UserManager::Get()->IsLoggedInAsStub()) {
        LOG(WARNING) << "Loading content for a profile without "
                     << "session restore?";
      }
      return false;

---

I didn't have any previously-opened pages that got restored automatically, so this seems pretty weird.

Zel, it looks like you added this warning in https://chromiumcodereview.appspot.com/23678007 (with Scott and Xiyuan reviewing). Does it indicate a real problem? Have the assumptions about when this function is called changed?