Fix cloud policy duplicate registrations issue.

chrome/browser/policy/cloud_policy_client.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_POLICY_CLOUD_POLICY_CLIENT_H_
 #define CHROME_BROWSER_POLICY_CLOUD_POLICY_CLIENT_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 145 matching lines @@
       const PolicyNamespaceKey& policy_ns_key) const;
 
   DeviceManagementStatus status() const {
     return status_;
   }
 
  protected:
   // A set of PolicyNamespaceKeys to fetch.
   typedef std::set<PolicyNamespaceKey> NamespaceSet;
 
+  // Callback for retries of registration requests.
+  void OnRetryRegister(DeviceManagementRequestJob* job);
+
   // Callback for registration requests.
   void OnRegisterCompleted(
       DeviceManagementStatus status,
       const enterprise_management::DeviceManagementResponse& response);
 
   // Callback for policy fetch requests.
   void OnPolicyFetchCompleted(
       DeviceManagementStatus status,
       const enterprise_management::DeviceManagementResponse& response);
 
@@ skipping 34 matching lines @@
 
   ObserverList<Observer, true> observers_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(CloudPolicyClient);
 };
 
 }  // namespace policy
 
 #endif  // CHROME_BROWSER_POLICY_CLOUD_POLICY_CLIENT_H_