GTTF: Clean up DownloadFileManager

chrome/browser/profile_impl.cc

Index: chrome/browser/profile_impl.cc
diff --git a/chrome/browser/profile_impl.cc b/chrome/browser/profile_impl.cc
index 6a7cb51ed73bd11d27abfe187b8049e5537007fc..6d0f40c2028b1679f3e0c708dd9476b7c2db92e6 100644
--- a/chrome/browser/profile_impl.cc
+++ b/chrome/browser/profile_impl.cc
@@ -463,9 +463,13 @@ ProfileImpl::~ProfileImpl() {
   // shut down the database.
   template_url_model_.reset();
 
-  // The download manager queries the history system and should be deleted
-  // before the history is shutdown so it can properly cancel all requests.
-  download_manager_ = NULL;
+  // DownloadManager is lazily created, so check before accessing it.
+  if (download_manager_.get()) {
+    // The download manager queries the history system and should be shutdown
+    // before the history is shutdown so it can properly cancel all requests.
+    download_manager_->Shutdown();
+    download_manager_ = NULL;
+  }
 
   // The theme provider provides bitmaps to whoever wants them.
   theme_provider_.reset();