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

chrome/browser/views/extensions/extension_install_prompt.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 "app/l10n_util.h"
 #include "base/file_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/common/extensions/extension.h"
 #include "grit/generated_resources.h"
 #include "views/controls/button/checkbox.h"
 #include "views/controls/image_view.h"
 #include "views/controls/label.h"
 #include "views/controls/link.h"
 #include "views/standard_layout.h"
@@ skipping 189 matching lines @@
   if (!window) {
     delegate->InstallUIAbort();
     return;
   }
 
   views::Window::CreateChromeWindow(window->GetNativeHandle(), gfx::Rect(),
       new InstallDialogContent(delegate, extension, icon,
                                UTF16ToWideHack(warning_text),
                                type))->Show();
 }