[Mac, Win] Only show the user manager tutorial if "See what's new" is clicked.

chrome/browser/profiles/profile.cc

 // 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.
 
 #include "chrome/browser/profiles/profile.h"
 
 #include <string>
 
 #include "base/prefs/pref_service.h"
 #include "build/build_config.h"
@@ skipping 184 matching lines @@
 #endif
 #if defined(SPDY_PROXY_AUTH_ORIGIN)
   data_reduction_proxy::RegisterSyncableProfilePrefs(registry);
 #endif  // defined(SPDY_PROXY_AUTH_ORIGIN)
 #if !defined(OS_ANDROID) && !defined(OS_CHROMEOS) && !defined(OS_IOS)
   // Preferences related to the avatar bubble and user manager tutorials.
   registry->RegisterIntegerPref(
       prefs::kProfileAvatarTutorialShown,
       0,
       user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
-  registry->RegisterBooleanPref(
-      prefs::kProfileUserManagerTutorialShown,
-      false,
-      user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
 #endif
 }
 
 std::string Profile::GetDebugName() {
   std::string name = GetPath().BaseName().MaybeAsASCII();
   if (name.empty()) {
     name = "UnknownProfile";
   }
   return name;
 }
@@ skipping 36 matching lines @@
         content::NotificationService::NoDetails());
   }
 }
 
 bool ProfileCompare::operator()(Profile* a, Profile* b) const {
   DCHECK(a && b);
   if (a->IsSameProfile(b))
     return false;
   return a->GetOriginalProfile() < b->GetOriginalProfile();
 }