Fix race conditions in ImageDecoder.

chrome/browser/chromeos/login/screens/user_image_screen.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/chromeos/login/screens/user_image_screen.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 48 matching lines @@
 
 // static
 UserImageScreen* UserImageScreen::Get(ScreenManager* manager) {
   return static_cast<UserImageScreen*>(
       manager->GetScreen(WizardController::kUserImageScreenName));
 }
 
 UserImageScreen::UserImageScreen(BaseScreenDelegate* base_screen_delegate,
                                  UserImageView* view)
     : UserImageModel(base_screen_delegate),
-      ImageRequest(
-          BrowserThread::GetMessageLoopProxyForThread(BrowserThread::UI)),
       view_(view),
       accept_photo_after_decoding_(false),
       selected_image_(user_manager::User::USER_IMAGE_INVALID),
       is_screen_ready_(false),
       user_has_selected_image_(false) {
   if (view_)
     view_->Bind(*this);
   notification_registrar_.Add(this,
                               chrome::NOTIFICATION_PROFILE_IMAGE_UPDATED,
                               content::NotificationService::AllSources());
@@ skipping 257 matching lines @@
 
 void UserImageScreen::ExitScreen() {
   policy_registrar_.reset();
   sync_timer_.reset();
   if (UserImageSyncObserver* sync_observer = GetSyncObserver())
     sync_observer->RemoveObserver(this);
   Finish(BaseScreenDelegate::USER_IMAGE_SELECTED);
 }
 
 }  // namespace chromeos