Add TestBrowserThreadBundle into RenderViewHostTestHarness. Kill some unnecessary real threads.

chrome/browser/download/chrome_download_manager_delegate_unittest.cc

 // Copyright (c) 2012 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 "base/files/file_path.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/message_loop.h"
 #include "base/prefs/pref_service.h"
 #include "base/run_loop.h"
 #include "chrome/browser/download/chrome_download_manager_delegate.h"
@@ skipping 150 matching lines @@
 
  private:
   void OnDownloadTargetDone(DownloadTarget* result,
                             const base::FilePath& target_path,
                             DownloadItem::TargetDisposition disposition,
                             content::DownloadDangerType danger_type,
                             const base::FilePath& intermediate_path);
 
   TestingPrefServiceSyncable* pref_service_;
   base::ScopedTempDir test_download_dir_;
-  content::TestBrowserThread ui_thread_;
-  content::TestBrowserThread file_thread_;
   scoped_ptr<content::MockDownloadManager> download_manager_;
   scoped_refptr<TestChromeDownloadManagerDelegate> delegate_;
   MockWebContentsDelegate web_contents_delegate_;
 };
 
 ChromeDownloadManagerDelegateTest::ChromeDownloadManagerDelegateTest()
-    : ChromeRenderViewHostTestHarness(),
-      ui_thread_(content::BrowserThread::UI, &message_loop_),
-      file_thread_(content::BrowserThread::FILE, &message_loop_),
-      download_manager_(new ::testing::NiceMock<content::MockDownloadManager>) {
+    : download_manager_(new ::testing::NiceMock<content::MockDownloadManager>) {
 }
 
 void ChromeDownloadManagerDelegateTest::SetUp() {
   ChromeRenderViewHostTestHarness::SetUp();
 
   CHECK(profile());
   delegate_ = new TestChromeDownloadManagerDelegate(profile());
   delegate_->SetDownloadManager(download_manager_.get());
   pref_service_ = profile()->GetTestingPrefService();
   web_contents()->SetDelegate(&web_contents_delegate_);
 
   ASSERT_TRUE(test_download_dir_.CreateUniqueTempDir());
   SetDefaultDownloadPath(test_download_dir_.path());
 }
 
 void ChromeDownloadManagerDelegateTest::TearDown() {
-  message_loop_.RunUntilIdle();
+  base::RunLoop().RunUntilIdle();
   delegate_->Shutdown();
   ChromeRenderViewHostTestHarness::TearDown();
 }
 
 void ChromeDownloadManagerDelegateTest::VerifyAndClearExpectations() {
   ::testing::Mock::VerifyAndClearExpectations(delegate_.get());
 }
 
 content::MockDownloadItem*
     ChromeDownloadManagerDelegateTest::CreateActiveDownloadItem(int32 id) {
@@ skipping 157 matching lines @@
     DownloadTarget result;
     base::FilePath expected_prompt_path(GetPathInDownloadDir("foo.txt"));
     EXPECT_CALL(*delegate(),
                 MockPromptUserForDownloadPath(save_as_download.get(),
                                               expected_prompt_path, _))
         .WillOnce(Return(base::FilePath()));
     DetermineDownloadTarget(save_as_download.get(), &result);
     VerifyAndClearExpectations();
   }
 }