session_manager: Create ChromeSessionManager early

components/session_manager/core/session_manager.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef COMPONENTS_SESSION_MANAGER_CORE_SESSION_MANAGER_H_
 #define COMPONENTS_SESSION_MANAGER_CORE_SESSION_MANAGER_H_
 
-#include <memory>
-
 #include "base/macros.h"
 #include "components/session_manager/session_manager_export.h"
 #include "components/session_manager/session_manager_types.h"
 
 namespace session_manager {
 
-class SessionManagerDelegate;
-
 class SESSION_EXPORT SessionManager {
  public:
   SessionManager();
   virtual ~SessionManager();
 
   // Returns current SessionManager instance and NULL if it hasn't been
   // initialized yet.
   static SessionManager* Get();
 
   SessionState session_state() const { return session_state_; }
   virtual void SetSessionState(SessionState state);
 
   // Returns true if we're logged in and browser has been started i.e.
   // browser_creator.LaunchBrowser(...) was called after sign in
   // or restart after crash.
   virtual bool IsSessionStarted() const;
 
   // Called when browser session is started i.e. after
   // browser_creator.LaunchBrowser(...) was called after user sign in.
   // When user is at the image screen IsUserLoggedIn() will return true
   // but IsSessionStarted() will return false. During the kiosk splash screen,
   // we perform additional initialization after the user is logged in but
   // before the session has been started.
   virtual void SessionStarted();
 
-  // Let session delegate executed on its plan of actions depending on the
-  // current session type / state.
-  void Start();
-
  protected:
-  // Initializes SessionManager with delegate.
-  void Initialize(SessionManagerDelegate* delegate);
-
   // Sets SessionManager instance.
   static void SetInstance(SessionManager* session_manager);
 
  private:
   // Pointer to the existing SessionManager instance (if any).
   // Set in ctor, reset in dtor. Not owned since specific implementation of
   // SessionManager should decide on its own appropriate owner of SessionManager
   // instance. For src/chrome implementation such place is
   // g_browser_process->platform_part().
   static SessionManager* instance;
 
   SessionState session_state_ = SessionState::UNKNOWN;
-  std::unique_ptr<SessionManagerDelegate> delegate_;
 
   // True if SessionStarted() has been called.
   bool session_started_ = false;
 
   DISALLOW_COPY_AND_ASSIGN(SessionManager);
 };
 
-class SESSION_EXPORT SessionManagerDelegate {
- public:
-  SessionManagerDelegate();
-  virtual ~SessionManagerDelegate();
-
-  virtual void SetSessionManager(
-      session_manager::SessionManager* session_manager);
-
-  // Executes specific actions defined by this delegate.
-  virtual void Start() = 0;
-
- protected:
-  session_manager::SessionManager* session_manager_ = nullptr;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(SessionManagerDelegate);
-};
-
 }  // namespace session_manager
 
 #endif  // COMPONENTS_SESSION_MANAGER_CORE_SESSION_MANAGER_H_