[Mac, Win] Show a user manager tutorial once per profile.

chrome/browser/prefs/browser_prefs.cc

Index: chrome/browser/prefs/browser_prefs.cc
diff --git a/chrome/browser/prefs/browser_prefs.cc b/chrome/browser/prefs/browser_prefs.cc
index d100644d07eca684f747fc17704cd4f8f95e6efb..af7ea78f719c76fd3f40c00197d236783a2d925e 100644
--- a/chrome/browser/prefs/browser_prefs.cc
+++ b/chrome/browser/prefs/browser_prefs.cc
@@ -478,10 +478,6 @@ void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry) {
       std::string(),
       user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
 #endif
-
-#if !defined(OS_ANDROID) && !defined(OS_CHROMEOS)
-  RegisterNewProfileUIPrefs(registry);
-#endif
 }
 
 void RegisterUserProfilePrefs(user_prefs::PrefRegistrySyncable* registry) {
@@ -504,15 +500,6 @@ void RegisterLoginProfilePrefs(user_prefs::PrefRegistrySyncable* registry) {
 }
 #endif
 
-#if !defined(OS_ANDROID) && !defined(OS_CHROMEOS)
-void RegisterNewProfileUIPrefs(user_prefs::PrefRegistrySyncable* registry) {
-  registry->RegisterIntegerPref(
-      prefs::kProfileAvatarTutorialShown,
-      0,
-      user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
-}
-#endif
-
 void MigrateUserPrefs(Profile* profile) {
   PrefService* prefs = profile->GetPrefs();