DownloadManagerDelegate::ShouldCompleteDownload(callback)

chrome/browser/download/download_completion_blocker.cc

Index: chrome/browser/download/download_completion_blocker.cc
diff --git a/chrome/browser/download/download_completion_blocker.cc b/chrome/browser/download/download_completion_blocker.cc
new file mode 100644
index 0000000000000000000000000000000000000000..5ed0ea996e35b5919bbcbe7f64895127f262c6e1
--- /dev/null
+++ b/chrome/browser/download/download_completion_blocker.cc
@@ -0,0 +1,23 @@
+// 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/download/download_completion_blocker.h"
+
+#include "base/logging.h"
+
+DownloadCompletionBlocker::DownloadCompletionBlocker()
+  : is_complete_(false) {
+}
+
+DownloadCompletionBlocker::~DownloadCompletionBlocker() {
+}
+
+void DownloadCompletionBlocker::CompleteDownload() {
+  DCHECK(!is_complete_);
+  is_complete_ = true;
+  if (callback_.is_null())
+    return;
+  callback_.Run();
+  callback_.Reset();
+}