Modify the "dangerous download" algorithm as follows. Original patch by Pier...

chrome/browser/history/history_unittest.cc

 // Copyright (c) 2010 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.
 
 // History unit tests come in two flavors:
 //
 // 1. The more complicated style is that the unit test creates a full history
 //    service. This spawns a background thread for the history backend, and
 //    all communication is asynchronous. This is useful for testing more
 //    complicated things or end-to-end behavior.
@@ skipping 181 matching lines @@
 
     // Wait for the backend class to terminate before deleting the files and
     // moving to the next test. Note: if this never terminates, somebody is
     // probably leaking a reference to the history backend, so it never calls
     // our destroy task.
     MessageLoop::current()->Run();
   }
 
   int64 AddDownload(int32 state, const Time& time) {
     DownloadCreateInfo download(FilePath(FILE_PATH_LITERAL("foo-path")),
-                                GURL("foo-url"), time, 0, 512, state, 0);
+                                GURL("foo-url"), time, 0, 512, state, 0, false);
     return db_->CreateDownload(download);
   }
 
   // Fills the query_url_row_ and query_url_visits_ structures with the
   // information about the given URL and returns true. If the URL was not
   // found, this will return false and those structures will not be changed.
   bool QueryURL(HistoryService* history, const GURL& url) {
     history->QueryURL(url, true, &consumer_,
                       NewCallback(this, &HistoryTest::SaveURLAndQuit));
     MessageLoop::current()->Run();  // Will be exited in SaveURLAndQuit.
@@ skipping 719 matching lines @@
   history_service_ = history;
   history->ScheduleDBTask(task.get(), &request_consumer);
   request_consumer.CancelAllRequests();
   CleanupHistoryService();
   // WARNING: history has now been deleted.
   history = NULL;
   ASSERT_FALSE(task->done_invoked);
 }
 
 }  // namespace history