Cosmetic cleanups in chrome/browser/policy/

chrome/browser/policy/config_dir_policy_provider.h

 // 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_CONFIG_DIR_POLICY_PROVIDER_H_
 #define CHROME_BROWSER_POLICY_CONFIG_DIR_POLICY_PROVIDER_H_
 #pragma once
 
+#include "base/time.h"
+#include "base/values.h"
 #include "chrome/browser/policy/file_based_policy_provider.h"
 
+class FilePath;
+
 namespace policy {
 
 // Policy provider backed by JSON files in a configuration directory.
 class ConfigDirPolicyProvider : public FileBasedPolicyProvider {
  public:
   ConfigDirPolicyProvider(
       const ConfigurationPolicyProvider::PolicyDefinitionList* policy_list,
       const FilePath& config_dir);
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ConfigDirPolicyProvider);
 };
 
 // A provider delegate implementation backed by a set of files in a given
 // directory. The files should contain JSON-formatted policy settings. They are
 // merged together and the result is returned via the ProviderDelegate
 // interface. The files are consulted in lexicographic file name order, so the
 // last value read takes precedence in case of preference key collisions.
 class ConfigDirPolicyProviderDelegate
     : public FileBasedPolicyProvider::ProviderDelegate {
  public:
   explicit ConfigDirPolicyProviderDelegate(const FilePath& config_dir);
 
   // FileBasedPolicyProvider::ProviderDelegate implementation.
-  virtual DictionaryValue* Load();
-  virtual base::Time GetLastModification();
+  virtual DictionaryValue* Load() OVERRIDE;
+  virtual base::Time GetLastModification() OVERRIDE;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ConfigDirPolicyProviderDelegate);
 };
 
 }  // namespace policy
 
 #endif  // CHROME_BROWSER_POLICY_CONFIG_DIR_POLICY_PROVIDER_H_