Cache the Windows Parental Controls Platform Answer

chrome/browser/prefs/incognito_mode_prefs.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_PREFS_INCOGNITO_MODE_PREFS_H_
 #define CHROME_BROWSER_PREFS_INCOGNITO_MODE_PREFS_H_
 
 #include "base/basictypes.h"
 
 class PrefService;
@@ skipping 50 matching lines @@
   // Returns true if |profile| can open a new Browser. This checks the incognito
   // availability policies and verifies if the |profile| type is allowed to
   // open new windows.
   static bool CanOpenBrowser(Profile* profile);
 
   // Returns whether parental controls have been enabled on the platform. This
   // method simply returns a cached value and thus the result may be stale. May
   // be called on any thread.
   static bool ArePlatformParentalControlsEnabledCached();
 
-#if defined(OS_WIN)
   // Initializes the parental control settings. Must be called on UI thread and
   // before |ArePlatformParentalControlsEnabled|.
   static void InitializePlatformParentalControls();
-#endif // OS_WIN
+
+#if defined(UNIT_TEST)
+  static void UninitializePlatformParentalControls() {
+    UninitializePlatformParentalControlsImpl();
+  }
+#endif  // defined(UNIT_TEST)
 
  private:
-  // Returns whether parental controls have been enabled on the platform, which
-  // if enabled will overrule the Availability as configured in prefs.
-  static bool ArePlatformParentalControlsEnabled();
+  static void UninitializePlatformParentalControlsImpl();
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(IncognitoModePrefs);
 };
 
 #endif  // CHROME_BROWSER_PREFS_INCOGNITO_MODE_PREFS_H_