Allow WebUI Tests to use preLoad in HtmlDialogUI.

chrome/test/data/webui/hung_renderer_dialog_ui_test-inl.h

 // 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/browser.h"
 #include "chrome/browser/ui/webui/chrome_web_ui.h"
 #include "chrome/browser/ui/webui/hung_renderer_dialog.h"
 #include "chrome/browser/ui/webui/web_ui_browsertest.h"
 #include "chrome/common/url_constants.h"
 #include "chrome/test/base/test_html_dialog_observer.h"
 #include "content/browser/renderer_host/render_view_host.h"
 #include "content/browser/tab_contents/tab_contents.h"
 #include "content/browser/webui/web_ui.h"
 
 // Test framework for chrome/test/data/webui/hung_renderer_dialog_test.js.
 class HungRendererDialogUITest : public WebUIBrowserTest {
  public:
   HungRendererDialogUITest();
   virtual ~HungRendererDialogUITest();
 
- private:
-  virtual void SetUpOnMainThread() OVERRIDE;
+ protected:
+  void ShowHungRendererDialogInternal();
 };
 
-void HungRendererDialogUITest::SetUpOnMainThread() {
+void HungRendererDialogUITest::ShowHungRendererDialogInternal() {
   // Force the flag so that we will use the WebUI version of the Dialog.
   ChromeWebUI::OverrideMoreWebUI(true);
 
   // Choose which tab contents to report as hung.  In this case, the default
   // tab contents will be about:blank.
-  ASSERT_TRUE(browser() != NULL);
+  ASSERT_TRUE(browser());
   TabContents* tab_contents = browser()->GetSelectedTabContents();
 
   // The TestHtmlDialogObserver will catch our dialog when it gets created.
-  TestHtmlDialogObserver dialog_observer;
+  TestHtmlDialogObserver dialog_observer(this);
 
   // Show a disabled Hung Renderer Dialog that won't kill processes or restart
   // hang timers.
   HungRendererDialog::ShowHungRendererDialogInternal(tab_contents, false);
 
   // Now we can get the WebUI object from the observer, and make some details
   // about our test available to the JavaScript.
   WebUI* webui = dialog_observer.GetWebUI();
   webui->tab_contents()->render_view_host()->SetWebUIProperty(
       "expectedUrl", chrome::kChromeUIHungRendererDialogURL);
   webui->tab_contents()->render_view_host()->SetWebUIProperty(
       "expectedTitle", "about:blank");
 
   // Tell the test which WebUI instance we are dealing with and complete
   // initialization of this test.
   SetWebUIInstance(webui);
-  WebUIBrowserTest::SetUpOnMainThread();
 }