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

chrome/browser/chromeos/policy/configuration_policy_handler_chromeos.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_CHROMEOS_POLICY_CONFIGURATION_POLICY_HANDLER_CHROMEOS_H_
 #define CHROME_BROWSER_CHROMEOS_POLICY_CONFIGURATION_POLICY_HANDLER_CHROMEOS_H_
 
 #include "chrome/browser/policy/configuration_policy_handler.h"
 #include "chromeos/network/network_ui_data.h"
 #include "chromeos/network/onc/onc_constants.h"
@@ skipping 60 matching lines @@
   virtual ~ScreenMagnifierPolicyHandler();
 
   // IntRangePolicyHandlerBase:
   virtual void ApplyPolicySettings(const PolicyMap& policies,
                                    PrefValueMap* prefs) OVERRIDE;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ScreenMagnifierPolicyHandler);
 };
 
+// ConfigurationPolicyHandler for login screen power management settings. This
+// does not actually set any prefs, it just checks whether the settings are
+// valid and generates errors if appropriate.
+class LoginScreenPowerManagementPolicyHandler
+    : public TypeCheckingPolicyHandler {
+ public:
+  LoginScreenPowerManagementPolicyHandler();
+  virtual ~LoginScreenPowerManagementPolicyHandler();
+
+  // TypeCheckingPolicyHandler:
+  virtual bool CheckPolicySettings(const PolicyMap& policies,
+                                   PolicyErrorMap* errors) OVERRIDE;
+  virtual void ApplyPolicySettings(const PolicyMap& policies,
+                                   PrefValueMap* prefs) OVERRIDE;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(LoginScreenPowerManagementPolicyHandler);
+};
+
 }  // namespace policy
 
 #endif  // CHROME_BROWSER_CHROMEOS_POLICY_CONFIGURATION_POLICY_HANDLER_CHROMEOS_H_