Support decoding GenericNamedValue based policy.

chrome/browser/policy/user_policy_cache.h

Index: chrome/browser/policy/user_policy_cache.h
diff --git a/chrome/browser/policy/user_policy_cache.h b/chrome/browser/policy/user_policy_cache.h
index 316497fe0dcafa1b88cbe95b001f9e3da6c00ab4..3d6b56bcd92764f7f176ced7aa9b518393aedbde 100644
--- a/chrome/browser/policy/user_policy_cache.h
+++ b/chrome/browser/policy/user_policy_cache.h
@@ -6,9 +6,17 @@
 #define CHROME_BROWSER_POLICY_USER_POLICY_CACHE_H_
 #pragma once
 
+#include <string>
+
 #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 GenericValue;
+}  // namespace enterprise_management
+// </Old-style policy support>
+
 namespace policy {
 
 // CloudPolicyCacheBase implementation that persists policy information
@@ -32,6 +40,23 @@ class UserPolicyCache : public CloudPolicyCacheBase {
                                 PolicyMap* mandatory,
                                 PolicyMap* recommended) OVERRIDE;
 
+  // <Old-style policy support>
+  // The following member functions 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 std::string& policy_data,
+                                 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_;