session_manager: Create ChromeSessionManager early

components/session_manager/core/session_manager.h

Index: components/session_manager/core/session_manager.h
diff --git a/components/session_manager/core/session_manager.h b/components/session_manager/core/session_manager.h
index e7550e1032e5f64c4970139f808accb673ddbd8e..53623178136041a46941716bd4f08a3a9b935a70 100644
--- a/components/session_manager/core/session_manager.h
+++ b/components/session_manager/core/session_manager.h
@@ -5,16 +5,12 @@
 #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();
@@ -40,14 +36,7 @@ class SESSION_EXPORT SessionManager {
   // 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);
 
@@ -60,7 +49,6 @@ class SESSION_EXPORT SessionManager {
   static SessionManager* instance;
 
   SessionState session_state_ = SessionState::UNKNOWN;
-  std::unique_ptr<SessionManagerDelegate> delegate_;
 
   // True if SessionStarted() has been called.
   bool session_started_ = false;
@@ -68,24 +56,6 @@ class SESSION_EXPORT SessionManager {
   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_