Revert "Fix a ton of compiler warnings."

chrome/browser/gtk/download_request_dialog_delegate_gtk.cc

 // Copyright (c) 2009 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/gtk/download_request_dialog_delegate_gtk.h"
 
 #include "app/l10n_util.h"
 #include "chrome/browser/gtk/constrained_window_gtk.h"
 #include "chrome/common/gtk_util.h"
 #include "chrome/browser/tab_contents/tab_contents.h"
@@ skipping 11 matching lines @@
 DownloadRequestDialogDelegateGtk::~DownloadRequestDialogDelegateGtk() {
   root_.Destroy();
 }
 
 DownloadRequestDialogDelegateGtk::DownloadRequestDialogDelegateGtk(
     TabContents* tab,
     DownloadRequestManager::TabDownloadState* host)
     : DownloadRequestDialogDelegate(host),
       responded_(false) {
   // Create dialog.
-  root_.Own(gtk_vbox_new(false, gtk_util::kContentAreaBorder));
+  root_.Own(gtk_vbox_new(NULL, gtk_util::kContentAreaBorder));
   GtkWidget* label = gtk_label_new(
       l10n_util::GetStringUTF8(IDS_MULTI_DOWNLOAD_WARNING).c_str());
   gtk_misc_set_alignment(GTK_MISC(label), 0, 0.5);
   gtk_label_set_line_wrap(GTK_LABEL(label), TRUE);
   gtk_box_pack_start(GTK_BOX(root_.get()), label, FALSE, FALSE, 0);
 
   GtkWidget* hbox = gtk_hbutton_box_new();
   gtk_button_box_set_layout(GTK_BUTTON_BOX(hbox), GTK_BUTTONBOX_END);
   gtk_box_set_spacing(GTK_BOX(hbox), kButtonSpacing);
   gtk_box_pack_start(GTK_BOX(root_.get()), hbox, FALSE, FALSE, 0);
@@ skipping 42 matching lines @@
   DoAccept();
   responded_ = true;
   CloseWindow();
 }
 
 void DownloadRequestDialogDelegateGtk::OnDenyClicked() {
   DoCancel();
   responded_ = true;
   CloseWindow();
 }