Move CancelableTaskTracker to //base/task/CancelableTaskTracker.

chrome/browser/ui/cocoa/download/download_item_mac.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_UI_COCOA_DOWNLOAD_DOWNLOAD_ITEM_MAC_H_
 #define CHROME_BROWSER_UI_COCOA_DOWNLOAD_DOWNLOAD_ITEM_MAC_H_
 
 #import <Cocoa/Cocoa.h>
 
+#include "base/task/cancelable_task_tracker.h"
 #include "chrome/browser/download/download_item_model.h"
 #include "chrome/browser/icon_manager.h"
-#include "chrome/common/cancelable_task_tracker.h"
 #include "content/public/browser/download_item.h"
 #include "content/public/browser/download_manager.h"
 
 @class DownloadItemController;
 
 namespace gfx{
 class Image;
 }
 
 // A class that bridges the visible mac download items to chromium's download
@@ skipping 22 matching lines @@
   // Callback for asynchronous icon loading.
   void OnExtractIconComplete(gfx::Image* icon_bitmap);
 
   // The download item model we represent.
   DownloadItemModel download_model_;
 
   // The objective-c controller object.
   DownloadItemController* item_controller_;  // weak, owns us.
 
   // For canceling an in progress icon request.
-  CancelableTaskTracker cancelable_task_tracker_;
+  base::CancelableTaskTracker cancelable_task_tracker_;
 
   // Stores the last known path where the file will be saved.
   base::FilePath lastFilePath_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadItemMac);
 };
 
 #endif  // CHROME_BROWSER_UI_COCOA_DOWNLOAD_DOWNLOAD_ITEM_MAC_H_