UserManager shutdown now also stops the profile image downloader.

chrome/browser/chromeos/login/user_image_manager.h

 // 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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_LOGIN_USER_IMAGE_MANAGER_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_USER_IMAGE_MANAGER_H_
 
 #include <string>
 
 #include "chrome/browser/chromeos/login/user.h"
@@ skipping 63 matching lines @@
 
   // Returns the result of the last successful profile image download, if any.
   // Otherwise, returns an empty bitmap.
   virtual const gfx::ImageSkia& DownloadedProfileImage() const = 0;
 
   // Returns sync observer attached to current user. Returns NULL if current
   // user can't sync images or user is not logged in.
   virtual UserImageSyncObserver* GetSyncObserver() const = 0;
 
   // Unregisters preference observers before browser process shutdown.
+  // Also cancels any profile image download in progress.
   virtual void Shutdown() = 0;
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_USER_IMAGE_MANAGER_H_