Prevent a crash when visiting about:hang in two NTPs.

chrome/browser/tab_contents/tab_contents.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/browser/tab_contents/tab_contents.h"
 
 #include <cmath>
 
 #include "app/l10n_util.h"
 #include "app/resource_bundle.h"
@@ skipping 846 matching lines @@
     NavigationController::ReloadType reload_type) {
   RenderViewHost* dest_render_view_host = render_manager_.Navigate(entry);
   if (!dest_render_view_host)
     return false;  // Unable to create the desired render view host.
 
   if (delegate_ && delegate_->ShouldEnablePreferredSizeNotifications()) {
     dest_render_view_host->EnablePreferredSizeChangedMode(
         kPreferredSizeWidth | kPreferredSizeHeightThisIsSlow);
   }
 
-  // For security, we should never send non-DOM-UI URLs (other than about:blank)
-  // to a DOM UI renderer.  Double check that here.
+  // For security, we should never send non-DOM-UI URLs to a DOM UI renderer.
+  // Double check that here.
   int enabled_bindings = dest_render_view_host->enabled_bindings();
   bool is_allowed_in_dom_ui_renderer =
-      DOMUIFactory::UseDOMUIForURL(profile(), entry.url()) ||
-      entry.url() == GURL(chrome::kAboutBlankURL);
+      DOMUIFactory::IsURLAcceptableForDOMUI(profile(), entry.url());
   CHECK(!BindingsPolicy::is_dom_ui_enabled(enabled_bindings) ||
         is_allowed_in_dom_ui_renderer);
 
   // Tell DevTools agent that it is attached prior to the navigation.
   DevToolsManager* devtools_manager = DevToolsManager::GetInstance();
   if (devtools_manager) {  // NULL in unit tests.
     devtools_manager->OnNavigatingToPendingEntry(render_view_host(),
                                                  dest_render_view_host,
                                                  entry.url());
   }
@@ skipping 2443 matching lines @@
   AddInfoBar(new SavePasswordInfoBarDelegate(this, form_to_save));
 }
 
 Profile* TabContents::GetProfileForPasswordManager() {
   return profile();
 }
 
 bool TabContents::DidLastPageLoadEncounterSSLErrors() {
   return controller().ssl_manager()->ProcessedSSLErrorFromRequest();
 }