cros: Fix loading user profile w/o UserSessionManager

chrome/browser/profiles/profile_manager.h

Index: chrome/browser/profiles/profile_manager.h
diff --git a/chrome/browser/profiles/profile_manager.h b/chrome/browser/profiles/profile_manager.h
index 083970a25c7ad95b8a4bcbecc58fa68022a00d06..699b5baf7658ea2cf508482a200c061dd9095e30 100644
--- a/chrome/browser/profiles/profile_manager.h
+++ b/chrome/browser/profiles/profile_manager.h
@@ -80,6 +80,12 @@ class ProfileManager : public content::NotificationObserver,
   // TODO(skuhne): Move into ash's new user management function.
   static Profile* GetActiveUserProfile();
 
+  // Load and return the initial profile for browser. On ChromeOS, this returns
+  // either the sign-in profile or the active user profile depending on whether
+  // browser is started normally or is restarted after crash. On other

[emaxx, 2017/06/08 19:43:54]

Hmm, does the function really behave like that? It calls GetInitialProfileDir()
which actually relies on logged_in_ to make the decision.

[xiyuan, 2017/06/08 20:30:40]

|logged_in_| is only set for ChromeOS. So for other platforms, this is always
the "Default" profile. On ChromeOS, this should only be called on browser
startup as the name implies. On the browser start up case, |logged_in_| is false
for normal browser start and set to true for browser start case.

+  // platforms, this returns the default profile.
+  static Profile* CreateInitialProfile();
+
   // Returns a profile for a specific profile directory within the user data
   // dir. This will return an existing profile it had already been created,
   // otherwise it will create and manage it.