Reverting this as it causes browser tests on the Linux ChromiumOS builder to fail.

chrome/browser/policy/user_cloud_policy_store_base.h

Index: chrome/browser/policy/user_cloud_policy_store_base.h
===================================================================
--- chrome/browser/policy/user_cloud_policy_store_base.h	(revision 150390)
+++ chrome/browser/policy/user_cloud_policy_store_base.h	(working copy)
@@ -1,42 +0,0 @@
-// 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_