Make the bookmarks bar disappear when the load after the new tab page commits...

chrome/browser/dom_ui/new_tab_ui.cc

 // Copyright (c) 2006-2008 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 "build/build_config.h"
 
 #include "chrome/browser/dom_ui/new_tab_ui.h"
 
 #include "base/histogram.h"
 #include "base/string_piece.h"
@@ skipping 364 matching lines @@
 };
 
 MostVisitedHandler::MostVisitedHandler(DOMUI* dom_ui)
     : DOMMessageHandler(dom_ui),
       dom_ui_(dom_ui) {
   // Register ourselves as the handler for the "mostvisited" message from
   // Javascript.
   dom_ui_->RegisterMessageCallback("getMostVisited",
       NewCallback(this, &MostVisitedHandler::HandleGetMostVisited));
 
-  // Set up our sources for thumbnail and favicon data.
-  // Ownership is passed to the ChromeURLDataManager.
-  g_browser_process->io_thread()->message_loop()->PostTask(FROM_HERE,
-      NewRunnableMethod(&chrome_url_data_manager,
-                        &ChromeURLDataManager::AddDataSource,
-                        new DOMUIThumbnailSource(dom_ui->GetProfile())));
-  g_browser_process->io_thread()->message_loop()->PostTask(FROM_HERE,
-      NewRunnableMethod(&chrome_url_data_manager,
-                        &ChromeURLDataManager::AddDataSource,
-                        new DOMUIFavIconSource(dom_ui->GetProfile())));
+  // Set up our sources for thumbnail and favicon data. Since we may be in
+  // testing mode with no I/O thread, only add our handler when an I/O thread
+  // exists. Ownership is passed to the ChromeURLDataManager.
+  if (g_browser_process->io_thread()) {
+    g_browser_process->io_thread()->message_loop()->PostTask(FROM_HERE,
+        NewRunnableMethod(&chrome_url_data_manager,
+                          &ChromeURLDataManager::AddDataSource,
+                          new DOMUIThumbnailSource(dom_ui->GetProfile())));
+    g_browser_process->io_thread()->message_loop()->PostTask(FROM_HERE,
+        NewRunnableMethod(&chrome_url_data_manager,
+                          &ChromeURLDataManager::AddDataSource,
+                          new DOMUIFavIconSource(dom_ui->GetProfile())));
+  }
 
   // Get notifications when history is cleared.
   NotificationService* service = NotificationService::current();
   service->AddObserver(this, NotificationType::HISTORY_URLS_DELETED,
                        Source<Profile>(dom_ui_->GetProfile()));
 }
 
 MostVisitedHandler::~MostVisitedHandler() {
   NotificationService* service = NotificationService::current();
   service->RemoveObserver(this, NotificationType::HISTORY_URLS_DELETED,
@@ skipping 640 matching lines @@
     AddMessageHandler(new HistoryHandler(this));
     AddMessageHandler(new MetricsHandler(this));
 #ifdef CHROME_PERSONALIZATION
     if (!Personalization::IsP13NDisabled()) {
       AddMessageHandler(Personalization::CreateNewTabPageHandler(this));
     }
 #endif
 
     NewTabHTMLSource* html_source = new NewTabHTMLSource();
 
-    g_browser_process->io_thread()->message_loop()->PostTask(FROM_HERE,
-        NewRunnableMethod(&chrome_url_data_manager,
-            &ChromeURLDataManager::AddDataSource,
-            html_source));
+    // In testing mode there may not be an I/O thread.
+    if (g_browser_process->io_thread()) {
+      g_browser_process->io_thread()->message_loop()->PostTask(FROM_HERE,
+          NewRunnableMethod(&chrome_url_data_manager,
+              &ChromeURLDataManager::AddDataSource,
+              html_source));
+    }
   }
 }