Rework the way Widget::Init works:

chrome/browser/ui/views/dropdown_bar_host_gtk.cc

 // Copyright (c) 2011 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/ui/views/dropdown_bar_host.h"
 
 #include <gdk/gdkkeysyms.h>
 
 #include "chrome/browser/ui/views/frame/browser_view.h"
 #include "content/browser/tab_contents/tab_contents.h"
 #include "views/widget/widget.h"
 #include "views/controls/textfield/textfield.h"
 
 #if defined(TOUCH_UI)
 #include "ui/base/keycodes/keyboard_code_conversion_gtk.h"
 #endif
 
-views::Widget* DropdownBarHost::CreateHost() {
-  views::Widget::CreateParams params(views::Widget::CreateParams::TYPE_CONTROL);
-  // We own the host.
-  params.delete_on_destroy = false;
-  return views::Widget::CreateWidget(params);
-}
-
 void DropdownBarHost::SetWidgetPositionNative(const gfx::Rect& new_pos,
                                               bool no_redraw) {
   host_->SetBounds(new_pos);
   host_->Show();
 }
 
 NativeWebKeyboardEvent DropdownBarHost::GetKeyboardEvent(
      const TabContents* contents,
      const views::KeyEvent& key_event) {
 #if defined(TOUCH_UI)
@@ skipping 18 matching lines @@
   // https://bugzilla.gnome.org/show_bug.cgi?id=644836 gets sorted out.
   if (key_event.key_code() == ui::VKEY_RETURN) {
     wke.text[0] = wke.unmodifiedText[0] = '\r';
   }
 
   return wke;
 #else
   return NativeWebKeyboardEvent(&key_event.native_event()->key);
 #endif
 }