Cleanup: Remove unneeded browser_thread.h usage.

chrome/browser/dom_ui/constrained_html_ui_browsertest.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 "chrome/test/ui/ui_test.h"
 
 #include "base/file_path.h"
 #include "base/message_loop.h"
-#include "chrome/browser/browser_thread.h"
 #include "chrome/browser/dom_ui/constrained_html_ui.h"
 #include "chrome/browser/dom_ui/html_dialog_ui.h"
 #include "chrome/browser/renderer_host/render_widget_host_view.h"
 #include "chrome/browser/tab_contents/tab_contents.h"
 #include "chrome/common/url_constants.h"
 #include "chrome/test/in_process_browser_test.h"
 #include "chrome/test/ui_test_utils.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/gmock/include/gmock/gmock.h"
 
@@ skipping 46 matching lines @@
   HtmlDialogUIDelegate* delegate = new TestHtmlDialogUIDelegate();
   TabContents* tab_contents = browser()->GetSelectedTabContents();
   ASSERT_TRUE(tab_contents != NULL);
 
   ConstrainedHtmlUI::CreateConstrainedHtmlDialog(browser()->profile(),
                                                  delegate,
                                                  tab_contents);
 
   ASSERT_EQ(1U, tab_contents->constrained_window_count());
 }