Add support for loading user cloud policy on desktop.

chrome/browser/policy/user_cloud_policy_store_base.h

Index: chrome/browser/policy/user_cloud_policy_store_base.h
diff --git a/chrome/browser/policy/user_cloud_policy_store_base.h b/chrome/browser/policy/user_cloud_policy_store_base.h
new file mode 100644
index 0000000000000000000000000000000000000000..5fda2f89b9242c1573efe38b0919e5b52b59e9e3
--- /dev/null
+++ b/chrome/browser/policy/user_cloud_policy_store_base.h
@@ -0,0 +1,42 @@
+// 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_USER_CLOUD_POLICY_STORE_BASE_H_
+#define CHROME_BROWSER_POLICY_USER_CLOUD_POLICY_STORE_BASE_H_
+
+#include <string>
+
+#include "base/basictypes.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/memory/weak_ptr.h"
+#include "chrome/browser/policy/cloud_policy_store.h"
+
+namespace policy {
+
+// Base class that implements common cross-platform UserCloudPolicyStore
+// functionality.
+class UserCloudPolicyStoreBase : public CloudPolicyStore {
+ public:
+  UserCloudPolicyStoreBase();
+  virtual ~UserCloudPolicyStoreBase();
+
+ protected:
+  // Creates a validator configured to validate a user policy. The caller owns
+  // the resulting object until StartValidation() is invoked.
+  scoped_ptr<UserCloudPolicyValidator> CreateValidator(
+      scoped_ptr<enterprise_management::PolicyFetchResponse> policy,
+      const UserCloudPolicyValidator::CompletionCallback& callback);
+
+  // Sets |policy_data| and |payload| as the active policy.
+  void InstallPolicy(
+      scoped_ptr<enterprise_management::PolicyData> policy_data,
+      scoped_ptr<enterprise_management::CloudPolicySettings> payload);
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(UserCloudPolicyStoreBase);
+};
+
+}  // namespace policy
+
+#endif  // CHROME_BROWSER_POLICY_USER_CLOUD_POLICY_STORE_BASE_H_