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      1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #include "chrome/browser/download/download_completion_blocker.h"
      6 
      7 #include "base/logging.h"
      8 
      9 DownloadCompletionBlocker::DownloadCompletionBlocker()
     10   : is_complete_(false) {
     11 }
     12 
     13 DownloadCompletionBlocker::~DownloadCompletionBlocker() {
     14 }
     15 
     16 void DownloadCompletionBlocker::CompleteDownload() {
     17   // Do not run |callback_| more than once.
     18   if (is_complete_)
     19     return;
     20   is_complete_ = true;
     21 
     22   if (callback_.is_null())
     23     return;
     24   callback_.Run();
     25   // |callback_| may delete |this|, so do not rely on |this| after running
     26   // |callback_|!
     27 }
     28