The User Manager should be backed by a special profile, not the guest one.

chrome/browser/ui/views/profiles/user_manager_view.cc

 // Copyright 2014 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/ui/views/profiles/user_manager_view.h"
 
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/lifetime/application_lifetime.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/browser/profiles/profile_metrics.h"
@@ skipping 63 matching lines @@
 // static
 void UserManagerView::Show(const base::FilePath& profile_path_to_focus,
                            profiles::UserManagerTutorialMode tutorial_mode) {
   ProfileMetrics::LogProfileSwitchUser(ProfileMetrics::OPEN_USER_MANAGER);
   if (instance_) {
     // If there's a user manager window open already, just activate it.
     instance_->GetWidget()->Activate();
     return;
   }
 
-  // Create the guest profile, if necessary, and open the user manager
-  // from the guest profile.
-  profiles::CreateGuestProfileForUserManager(
+  // Create the User Manager profile, if necessary, and open the User Manager
+  // when the profile is ready.
+  profiles::CreateUserManagerProfile(
       profile_path_to_focus,
       tutorial_mode,
-      base::Bind(&UserManagerView::OnGuestProfileCreated));
+      base::Bind(&UserManagerView::OnUserManagerProfileCreated));
 }
 
 // static
 void UserManagerView::Hide() {
   if (instance_)
     instance_->GetWidget()->Close();
 }
 
 // static
 bool UserManagerView::IsShowing() {
   return instance_ ? instance_->GetWidget()->IsActive() : false;
 }
 
 // static
-void UserManagerView::OnGuestProfileCreated(Profile* guest_profile,
-                                            const std::string& url) {
-  instance_ = new UserManagerView(guest_profile);
+void UserManagerView::OnUserManagerProfileCreated(Profile* profile,
+                                                  const std::string& url) {
+  instance_ = new UserManagerView(profile);
   DialogDelegate::CreateDialogWidget(instance_, NULL, NULL);
 
   gfx::NativeWindow window = instance_->GetWidget()->GetNativeWindow();
   instance_->keep_alive_.reset(new AutoKeepAlive(window));
 
 #if defined(OS_WIN)
   // Set the app id for the task manager to the app id of its parent
   ui::win::SetAppIdForWindow(
-      ShellIntegration::GetChromiumModelIdForProfile(
-          guest_profile->GetPath()),
+      ShellIntegration::GetChromiumModelIdForProfile(profile->GetPath()),
       views::HWNDForWidget(instance_->GetWidget()));
 #endif
   instance_->GetWidget()->Show();
 
   instance_->web_view_->LoadInitialURL(GURL(url));
   instance_->web_view_->RequestFocus();
 }
 
 gfx::Size UserManagerView::GetPreferredSize() {
   return gfx::Size(kWindowWidth, kWindowHeight);
@@ skipping 19 matching lines @@
   // Now that the window is closed, we can allow a new one to be opened.
   // (WindowClosing comes in asynchronously from the call to Close() and we
   // may have already opened a new instance).
   if (instance_ == this)
     instance_ = NULL;
 }
 
 bool UserManagerView::UseNewStyleForThisDialog() const {
   return false;
 }