Don't prompt to save malicious downloads on exit

chrome/browser/lifetime/application_lifetime.cc

 // 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/lifetime/application_lifetime.h"
 
 #include "ash/shell.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
@@ skipping 42 matching lines @@
 
 // Returns true if all browsers can be closed without user interaction.
 // This currently checks if there is pending download, or if it needs to
 // handle unload handler.
 bool AreAllBrowsersCloseable() {
   chrome::BrowserIterator browser_it;
   if (browser_it.done())
     return true;
 
   // If there are any downloads active, all browsers are not closeable.
-  if (DownloadService::DownloadCountAllProfiles() > 0)
+  // However, this does not block for malicious downloads.
+  if (DownloadService::NonMaliciousDownloadCountAllProfiles() > 0)
     return false;
 
   // Check TabsNeedBeforeUnloadFired().
   for (; !browser_it.done(); browser_it.Next()) {
     if (browser_it->TabsNeedBeforeUnloadFired())
       return false;
   }
   return true;
 }
 
@@ skipping 305 matching lines @@
   //    environment is still active.
   if (browser->host_desktop_type() == chrome::HOST_DESKTOP_TYPE_NATIVE)
     return !ash::Shell::HasInstance();
   else if (browser->host_desktop_type() == chrome::HOST_DESKTOP_TYPE_ASH)
     return BrowserList::GetInstance(chrome::HOST_DESKTOP_TYPE_NATIVE)->empty();
 #endif
   return true;
 }
 
 }  // namespace chrome