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..dc286e3cb1b5e29b34ef539183ceb85196e267e9 100644
--- a/chrome/browser/policy/user_policy_cache.h
+++ b/chrome/browser/policy/user_policy_cache.h
@@ -9,6 +9,13 @@
 #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
@@ -32,6 +39,23 @@ class UserPolicyCache : public CloudPolicyCacheBase {
                                 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_;