Disable incognito link if parental control is on

chrome/browser/prefs/incognito_mode_prefs.h

Index: chrome/browser/prefs/incognito_mode_prefs.h
diff --git a/chrome/browser/prefs/incognito_mode_prefs.h b/chrome/browser/prefs/incognito_mode_prefs.h
index d7d8d29160fb4dc244e3721709efc1d3e8bb723c..2ba2e14b29ef4c5ea0dd5d96fa36a82d7c1c4477 100644
--- a/chrome/browser/prefs/incognito_mode_prefs.h
+++ b/chrome/browser/prefs/incognito_mode_prefs.h
@@ -63,6 +63,17 @@ class IncognitoModePrefs {
   // 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
+
  private:
   // Returns whether parental controls have been enabled on the platform, which
   // if enabled will overrule the Availability as configured in prefs.