[session_manager] Move user session initialization code out of ExistingUserController

chrome/browser/chromeos/login/login_utils.h

Index: chrome/browser/chromeos/login/login_utils.h
diff --git a/chrome/browser/chromeos/login/login_utils.h b/chrome/browser/chromeos/login/login_utils.h
index cb8444419b07406a1ff4ed29283581b6d0ff0dcd..61d284a556cc3d38580e5d1d6140f9e6fda3d36f 100644
--- a/chrome/browser/chromeos/login/login_utils.h
+++ b/chrome/browser/chromeos/login/login_utils.h
@@ -29,7 +29,10 @@ class LoginUtils {
   class Delegate {
    public:
     // Called after profile is loaded and prepared for the session.
-    virtual void OnProfilePrepared(Profile* profile) = 0;
+    // |browser_launched| will be true is browser has been launched, otherwise
+    // it will return false and client is responsible on launching browser.
+    virtual void OnProfilePrepared(Profile* profile,
+                                   bool browser_launched) = 0;
 
 #if defined(ENABLE_RLZ)
     // Called after post-profile RLZ initialization.