Support decoding GenericNamedValue based policy.

chrome/browser/policy/user_policy_cache.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_USER_POLICY_CACHE_H_
 #define CHROME_BROWSER_POLICY_USER_POLICY_CACHE_H_
 #pragma once
 
 #include "base/file_path.h"
 #include "chrome/browser/policy/cloud_policy_cache_base.h"
 
+// <Old-style policy support> (see comment below)
+namespace enterprise_management {
+class CloudPolicySettings;
+class GenericValue;
+}  // namespace enterprise_management
+// </Old-style policy support>
+
 namespace policy {
 
 // CloudPolicyCacheBase implementation that persists policy information
 // into the file specified by the c'tor parameter |backing_file_path|.
 class UserPolicyCache : public CloudPolicyCacheBase {
  public:
   explicit UserPolicyCache(const FilePath& backing_file_path);
   virtual ~UserPolicyCache();
 
   // CloudPolicyCacheBase implementation:
   virtual void Load() OVERRIDE;
   virtual void SetPolicy(const em::PolicyFetchResponse& policy) OVERRIDE;
   virtual void SetUnmanaged() OVERRIDE;
 
  private:
   void PersistPolicy(const em::PolicyFetchResponse& policy,
                      const base::Time& timestamp);
 
   // CloudPolicyCacheBase implementation:
   virtual bool DecodePolicyData(const em::PolicyData& policy_data,
                                 PolicyMap* mandatory,
                                 PolicyMap* recommended) OVERRIDE;
 
+  // <Old-style policy support>
+  // The following methods are needed to support old-style policy and can
+  // be removed once all server-side components (CPanel, D3) have been migrated
+  // to providing the new policy format.
+
+  // If |mandatory| and |recommended| are both empty, and |policy_data|
+  // contains a field named "repeated GenericNamedValue named_value = 2;",
+  // this field is decoded into |mandatory|.
+  void MaybeDecodeOldstylePolicy(const em::CloudPolicySettings& policy,
+                                 PolicyMap* mandatory,
+                                 PolicyMap* recommended);
+
+  Value* DecodeIntegerValue(google::protobuf::int64 value) const;
+  Value* DecodeValue(const em::GenericValue& value) const;
+
+  // </Old-style policy support>
+
   // The file in which we store a cached version of the policy information.
   const FilePath backing_file_path_;
 
   DISALLOW_COPY_AND_ASSIGN(UserPolicyCache);
 };
 
 }  // namespace policy
 
 #endif  // CHROME_BROWSER_POLICY_USER_POLICY_CACHE_H_