Add policies to control power management on the Chrome OS login screen

chrome/browser/policy/configuration_policy_handler.h

 // 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_CONFIGURATION_POLICY_HANDLER_H_
 #define CHROME_BROWSER_POLICY_CONFIGURATION_POLICY_HANDLER_H_
 
+#include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/values.h"
 #include "chrome/browser/prefs/incognito_mode_prefs.h"
 #include "chrome/common/content_settings.h"
 
 class PrefValueMap;
 
 namespace policy {
 
 class PolicyErrorMap;
 class PolicyMap;
 
 // An abstract super class that subclasses should implement to map policies to
 // their corresponding preferences, and to check whether the policies are valid.
 class ConfigurationPolicyHandler {
  public:
+  static std::string ValueTypeToString(Value::Type type);
+
   ConfigurationPolicyHandler();
   virtual ~ConfigurationPolicyHandler();
 
   // Returns whether the policy settings handled by this
   // ConfigurationPolicyHandler can be applied.  Fills |errors| with error
   // messages or warnings.  |errors| may contain error messages even when
   // |CheckPolicySettings()| returns true.
   virtual bool CheckPolicySettings(const PolicyMap& policies,
                                    PolicyErrorMap* errors) = 0;
 
@@ skipping 498 matching lines @@
  private:
   void ApplyPolicySettingsFromHomePage(const PolicyMap& policies,
                                        PrefValueMap* prefs);
 
   DISALLOW_COPY_AND_ASSIGN(RestoreOnStartupPolicyHandler);
 };
 
 }  // namespace policy
 
 #endif  // CHROME_BROWSER_POLICY_CONFIGURATION_POLICY_HANDLER_H_