Make BrowserMainParts have an empty implementation to make embedding easier.

chrome/browser/ui/gtk/chrome_browser_main_extra_parts_gtk.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/ui/gtk/chrome_browser_main_extra_parts_gtk.h"
 
 #include <gtk/gtk.h>
 
 #include "base/command_line.h"
 #include "chrome/browser/chrome_browser_main.h"
 #include "chrome/browser/toolkit_extra_parts.h"
 #include "chrome/common/chrome_switches.h"
 #include "grit/chromium_strings.h"
 #include "grit/generated_resources.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/gfx/gtk_util.h"
 
-ChromeBrowserMainExtraPartsGtk::ChromeBrowserMainExtraPartsGtk()
-    : ChromeBrowserMainExtraParts() {
+ChromeBrowserMainExtraPartsGtk::ChromeBrowserMainExtraPartsGtk() {
 }
 
 void ChromeBrowserMainExtraPartsGtk::PreEarlyInitialization() {
   DetectRunningAsRoot();
 }
 
 
 void ChromeBrowserMainExtraPartsGtk::DetectRunningAsRoot() {
   if (geteuid() == 0) {
     const CommandLine& command_line = *CommandLine::ForCurrentProcess();
@@ skipping 50 matching lines @@
   gtk_widget_destroy(dialog);
 }
 
 namespace browser {
 
 void AddGtkToolkitExtraParts(ChromeBrowserMainParts* main_parts) {
   main_parts->AddParts(new ChromeBrowserMainExtraPartsGtk());
 }
 
 }  // namespace browser