Load sync token upon login

chrome/browser/chromeos/login/user_flow.h

 // Copyright (c) 2012 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 CHROME_BROWSER_CHROMEOS_LOGIN_USER_FLOW_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_USER_FLOW_H_
 
 #include "base/compiler_specific.h"
 #include "chrome/browser/chromeos/login/login_status_consumer.h"
+#include "chrome/browser/profiles/profile.h"
 
 namespace chromeos {
 
 class LoginDisplayHost;
 // Defines possible variants of user flow upon logging in.
 // See UserManager::SetUserFlow for usage contract.
 class UserFlow {
  public:
   virtual ~UserFlow() = 0;
   virtual bool ShouldLaunchBrowser() = 0;
   virtual bool ShouldSkipPostLoginScreens() = 0;
   virtual bool HandleLoginFailure(const LoginFailure& failure,
       LoginDisplayHost* host) = 0;
   virtual bool HandlePasswordChangeDetected(LoginDisplayHost* host) = 0;
-  virtual void LaunchExtraSteps(LoginDisplayHost* host) = 0;
+  virtual void LaunchExtraSteps(Profile* profile, LoginDisplayHost* host) = 0;
 };
 
 // UserFlow implementation for regular login flow.
 class DefaultUserFlow : public UserFlow {
  public:
   virtual ~DefaultUserFlow();
 
   virtual bool ShouldLaunchBrowser() OVERRIDE;
   virtual bool ShouldSkipPostLoginScreens() OVERRIDE;
   virtual bool HandleLoginFailure(const LoginFailure& failure,
       LoginDisplayHost* host) OVERRIDE;
   virtual bool HandlePasswordChangeDetected(LoginDisplayHost* host) OVERRIDE;
-  virtual void LaunchExtraSteps(LoginDisplayHost* host) OVERRIDE;
+  virtual void LaunchExtraSteps(Profile* profile,
+      LoginDisplayHost* host) OVERRIDE;
+};
+
+// UserFlow stub for non-regular flows.
+class ExtendedUserFlow : public UserFlow {
+ public:
+  explicit ExtendedUserFlow(const std::string& user_id);
+  virtual ~ExtendedUserFlow();
+
+ protected:
+  // Subclasses can call this method to unregister flow in the next event.
+  virtual void UnregisterFlowSoon();
+  std::string user_id() {
+    return user_id_;
+  };
+
+ private:
+  std::string user_id_;
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_USER_FLOW_H_