Store/Retrieve CrOS user policy in session_manager.

chrome/browser/policy/cloud_policy_identity_strategy.h

 // Copyright (c) 2011 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_POLICY_CLOUD_POLICY_IDENTITY_STRATEGY_H_
 #define CHROME_BROWSER_POLICY_CLOUD_POLICY_IDENTITY_STRATEGY_H_
 #pragma once
 
 #include <string>
 
@@ skipping 57 matching lines @@
   // values to the provided pointers.
   virtual bool GetCredentials(std::string* username,
                               std::string* auth_token) = 0;
 
   // Notifies the identity strategy that a new token has been fetched. It is up
   // to the identity strategy to store the token, decide whether it is going
   // to be used, send out an appropriate OnDeviceTokenChanged() notification
   // and return the new token in GetDeviceToken() calls.
   virtual void OnDeviceTokenAvailable(const std::string& token) = 0;
 
+  // Start loading the token cache.
+  virtual void LoadTokenCache() {}
+
  protected:
   // Notify observers that the effective token has changed.
   void NotifyDeviceTokenChanged();
 
   // Notify observers about authentication data change.
   void NotifyAuthChanged();
 
  private:
   ObserverList<Observer, true> observer_list_;
 
   DISALLOW_COPY_AND_ASSIGN(CloudPolicyIdentityStrategy);
 };
 
 }  // namespace policy
 
 #endif  // CHROME_BROWSER_POLICY_CLOUD_POLICY_IDENTITY_STRATEGY_H_