session_manager: Create ChromeSessionManager early

chrome/browser/chromeos/login/session/chrome_session_manager.h

Index: chrome/browser/chromeos/login/session/chrome_session_manager.h
diff --git a/chrome/browser/chromeos/login/session/chrome_session_manager.h b/chrome/browser/chromeos/login/session/chrome_session_manager.h
index 2a46d6c042dbcee5ac1506941535ed4b44bdcb15..ee75d633b5dd4c3c6898cec8959fdc70abd63d86 100644
--- a/chrome/browser/chromeos/login/session/chrome_session_manager.h
+++ b/chrome/browser/chromeos/login/session/chrome_session_manager.h
@@ -18,19 +18,19 @@ namespace chromeos {
 
 class ChromeSessionManager : public session_manager::SessionManager {
  public:
-  static std::unique_ptr<session_manager::SessionManager> CreateSessionManager(
-      const base::CommandLine& parsed_command_line,
-      Profile* profile,
-      bool is_running_test);
-
- private:
-  explicit ChromeSessionManager(
-      session_manager::SessionManagerDelegate* delegate);
+  ChromeSessionManager();
   ~ChromeSessionManager() override;
 
+  // Initialize and start user sessions as well as responsible on launching

[achuithb, 2016/10/27 19:12:45]

The grammar here isn't quite right. I don't quite understand what the intent
here is, so I can't help :/

[xiyuan, 2016/10/27 21:10:43]

Copy-n-pasted from existing BrowserProcessPlatformPart::SessionManager.
Re-phrased it to make it more readable.

+  // pre-session UI like out-of-box or login.
+  void Initialize(const base::CommandLine& parsed_command_line,
+                  Profile* profile,
+                  bool is_running_test);
+
   // session_manager::SessionManager:
   void SessionStarted() override;
 
+ private:
   DISALLOW_COPY_AND_ASSIGN(ChromeSessionManager);
 };