Disable incognito link if parental control is on

chrome/browser/signin/signin_header_helper.cc

Index: chrome/browser/signin/signin_header_helper.cc
diff --git a/chrome/browser/signin/signin_header_helper.cc b/chrome/browser/signin/signin_header_helper.cc
index fd7dee0d232aa637a3da456019262219cf486a71..a6ade4a3331c747c4325e950f3d7c092c0b16ea6 100644
--- a/chrome/browser/signin/signin_header_helper.cc
+++ b/chrome/browser/signin/signin_header_helper.cc
@@ -181,9 +181,9 @@ bool AppendMirrorRequestHeaderIfPossible(
   std::string account_id(io_data->google_services_account_id()->GetValue());
 
   int profile_mode_mask = PROFILE_MODE_DEFAULT;
-  // TODO(guohui): Needs to check for parent control as well.
   if (io_data->incognito_availibility()->GetValue() ==
-          IncognitoModePrefs::DISABLED) {
+          IncognitoModePrefs::DISABLED ||
+      IncognitoModePrefs::ArePlatformParentalControlsEnabledCached()) {
     profile_mode_mask |= PROFILE_MODE_INCOGNITO_DISABLED;
   }