Add TestBrowserThreadBundle into RenderViewHostTestHarness. Kill some unnecessary real threads.

chrome/browser/ui/ash/launcher/launcher_context_menu_unittest.cc

 // Copyright (c) 2013 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/ash/launcher/launcher_context_menu.h"
 
 #include "ash/launcher/launcher.h"
 #include "ash/launcher/launcher_model.h"
 #include "ash/launcher/launcher_types.h"
 #include "ash/test/ash_test_base.h"
@@ skipping 21 matching lines @@
 };
 
 class LauncherContextMenuTest : public ash::test::AshTestBase {
  protected:
   static bool IsItemPresentInMenu(LauncherContextMenu* menu, int command_id) {
     DCHECK(menu);
     return menu->GetIndexOfCommandId(command_id) != -1;
   }
 
   LauncherContextMenuTest()
-      : ash::test::AshTestBase(),
-        profile_(new TestingProfile()),
+      : profile_(new TestingProfile()),
         browser_thread_(content::BrowserThread::UI, message_loop()) {}
 
   virtual void SetUp() OVERRIDE {
     ash::test::AshTestBase::SetUp();
     controller_.reset(
         new TestChromeLauncherControllerPerBrowser(profile(),
                                                    &launcher_model_));
   }
 
   virtual void TearDown() OVERRIDE {
@@ skipping 55 matching lines @@
   EXPECT_TRUE(menu->IsCommandIdEnabled(LauncherContextMenu::MENU_NEW_WINDOW));
 
   // Disable Incognito mode.
   IncognitoModePrefs::SetAvailability(profile()->GetPrefs(),
                                       IncognitoModePrefs::FORCED);
   menu.reset(CreateLauncherContextMenu(ash::TYPE_BROWSER_SHORTCUT));
   ASSERT_TRUE(IsItemPresentInMenu(
       menu.get(), LauncherContextMenu::MENU_NEW_WINDOW));
   EXPECT_FALSE(menu->IsCommandIdEnabled(LauncherContextMenu::MENU_NEW_WINDOW));
 }