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diff --git a/chrome/browser/policy/device_management_policy_cache.h b/chrome/browser/policy/device_management_policy_cache.h
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+++ b/chrome/browser/policy/device_management_policy_cache.h
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+// Copyright (c) 2010 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_DEVICE_MANAGEMENT_POLICY_CACHE_H_
+#define CHROME_BROWSER_POLICY_DEVICE_MANAGEMENT_POLICY_CACHE_H_
+
+#include "base/file_path.h"
+#include "base/gtest_prod_util.h"
+#include "base/lock.h"
+#include "base/ref_counted.h"
+#include "base/scoped_ptr.h"
+#include "chrome/browser/policy/proto/device_management_backend.pb.h"
+
+class DictionaryValue;
+class Value;
+
+namespace policy {
+
+namespace em = enterprise_management;
+
+// Keeps the authoritative copy of cloud policy information as read from the
+// persistence file or determined by the policy backend. The cache doesn't talk
+// to the service directly, but receives updated policy information through
+// SetPolicy() calls, which is then persisted and decoded into the internal
+// Value representation chrome uses.
+class DeviceManagementPolicyCache {
+ public:
+  explicit DeviceManagementPolicyCache(const FilePath& backing_file_path);
+
+  // Loads policy information from the backing file. Non-existing or erroneous
+  // cache files are ignored.
+  void LoadPolicyFromFile();
+
+  // Resets the policy information.
+  void SetPolicy(const em::DevicePolicyResponse& policy);
+
+  // Gets the policy information. Ownership of the return value is transferred
+  // to the caller.
+  DictionaryValue* GetPolicy();
+
+ private:
+  friend class DeviceManagementPolicyCacheDecodeTest;
+  FRIEND_TEST_ALL_PREFIXES(DeviceManagementPolicyCacheDecodeTest, DecodePolicy);
+
+  // Decodes an int64 value. Checks whether the passed value fits the numeric
+  // limits of the value representation. Returns a value (ownership is
+  // transferred to the caller) on success, NULL on failure.
+  static Value* DecodeIntegerValue(google::protobuf::int64 value);
+
+  // Decode a GenericValue message to the Value representation used internally.
+  // Returns NULL if |value| is invalid (i.e. contains no actual value).
+  static Value* DecodeValue(const em::GenericValue& value);
+
+  // Decodes a policy message and returns it in Value representation. Ownership
+  // of the returned dictionary is transferred to the caller.
+  static DictionaryValue* DecodePolicy(
+      const em::DevicePolicyResponse& response);
+
+  // The file in which we store a cached version of the policy information.
+  const FilePath backing_file_path_;
+
+  // Protects |policy_|.
+  Lock lock_;
+
+  // Policy key-value information.
+  scoped_ptr<DictionaryValue> policy_;
+
+  // Tracks whether the store received a SetPolicy() call, which overrides any
+  // information loaded from the file.
+  bool fresh_policy_;
+};
+
+}  // namespace policy
+
+#endif  // CHROME_BROWSER_POLICY_DEVICE_MANAGEMENT_POLICY_CACHE_H_