After locking a profile and showing the User Manager, make Guest the active profile

chrome/browser/profiles/profile_info_cache.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_info_cache.h"
 
 #include "base/bind.h"
 #include "base/files/file_util.h"
 #include "base/i18n/case_conversion.h"
 #include "base/logging.h"
@@ skipping 717 matching lines @@
   if (value == ProfileIsUsingDefaultAvatarAtIndex(index))
     return;
 
   scoped_ptr<base::DictionaryValue> info(
       GetInfoForProfileAtIndex(index)->DeepCopy());
   info->SetBoolean(kIsUsingDefaultAvatarKey, value);
   // This takes ownership of |info|.
   SetInfoForProfileAtIndex(index, info.release());
 }
 
-bool ProfileInfoCache::IsDefaultProfileName(const base::string16& name) {
+bool ProfileInfoCache::IsDefaultProfileName(const base::string16& name) const {
   // Check if it's a "First user" old-style name.
   if (name == l10n_util::GetStringUTF16(IDS_DEFAULT_PROFILE_NAME) ||
       name == l10n_util::GetStringUTF16(IDS_LEGACY_DEFAULT_PROFILE_NAME))
     return true;
 
   // Check if it's one of the old-style profile names.
   for (size_t i = 0; i < arraysize(kDefaultNames); ++i) {
     if (name == l10n_util::GetStringUTF16(kDefaultNames[i]))
       return true;
   }
@@ skipping 349 matching lines @@
   std::vector<base::FilePath>::const_iterator it;
   for (it = profiles_to_rename.begin(); it != profiles_to_rename.end(); ++it) {
     size_t profile_index = GetIndexOfProfileWithPath(*it);
     SetProfileIsUsingDefaultNameAtIndex(profile_index, true);
     // This will assign a new "Person %d" type name and re-sort the cache.
     SetNameOfProfileAtIndex(profile_index, ChooseNameForNewProfile(
         GetAvatarIconIndexOfProfileAtIndex(profile_index)));
   }
 #endif
 }