Adds testing infrastructure to web_ui_browsertest to support testing HtmlDialogs.

chrome/browser/ui/webui/chrome_web_ui.cc

 // 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/webui/chrome_web_ui.h"
 
 #include "base/command_line.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/common/chrome_switches.h"
 #include "content/browser/tab_contents/tab_contents.h"
 
 #if defined(TOOLKIT_VIEWS)
 #include "views/widget/widget.h"
 #endif
 
+namespace {
+
+// If true, overrides IsMoreWebUI flag.
+bool override_more_webui_ = false;
+
+}  // namespace
+
 ChromeWebUI::ChromeWebUI(TabContents* contents)
     : WebUI(contents),
       force_bookmark_bar_visible_(false) {
 }
 
 ChromeWebUI::~ChromeWebUI() {
 }
 
 Profile* ChromeWebUI::GetProfile() const {
   return Profile::FromBrowserContext(tab_contents()->browser_context());
 }
 
 // static
 bool ChromeWebUI::IsMoreWebUI() {
   bool more_webui = CommandLine::ForCurrentProcess()->HasSwitch(
-      switches::kUseMoreWebUI);
+      switches::kUseMoreWebUI) || override_more_webui_;
 #if defined(TOOLKIT_VIEWS)
   more_webui |= views::Widget::IsPureViews();
 #endif
   return more_webui;
 }
+
+void ChromeWebUI::OverrideMoreWebUI(bool use_more_webui) {
+  override_more_webui_ = use_more_webui;
+}