FBTF: Clean up task.h in x11_util.h and header usage in some delegates.

chrome/browser/gtk/extension_install_prompt2_gtk.cc

 // Copyright (c) 2010 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 <gtk/gtk.h>
 
 #include "app/l10n_util.h"
 #include "base/string_util.h"
+#include "base/utf_string_conversions.h"
 #include "chrome/browser/browser_list.h"
 #include "chrome/browser/browser_window.h"
 #include "chrome/browser/extensions/extension_install_ui.h"
 #include "chrome/browser/gtk/browser_window_gtk.h"
 #include "chrome/browser/gtk/gtk_util.h"
 #include "chrome/common/extensions/extension.h"
 #include "gfx/gtk_util.h"
 #include "grit/generated_resources.h"
 #include "skia/ext/image_operations.h"
 
@@ skipping 163 matching lines @@
   BrowserWindowGtk* browser_window = static_cast<BrowserWindowGtk*>(
       browser->window());
   if (!browser_window) {
     delegate->InstallUIAbort();
     return;
   }
 
   ShowInstallPromptDialog2(browser_window->window(), icon, extension,
       delegate, permissions);
 }