Use ThreadChecker rather than DCHECK_CURRENTLY_ON.

chrome/browser/content_settings/content_settings_default_provider_unittest.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 "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "base/prefs/pref_service.h"
 #include "base/prefs/testing_pref_service.h"
 #include "chrome/browser/content_settings/content_settings_default_provider.h"
 #include "chrome/browser/content_settings/content_settings_mock_observer.h"
 #include "chrome/browser/content_settings/content_settings_utils.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/test/base/testing_profile.h"
-#include "content/public/test/test_browser_thread.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "url/gurl.h"
 
 using ::testing::_;
-using content::BrowserThread;
 
 class DefaultProviderTest : public testing::Test {
  public:
   DefaultProviderTest()
-      : ui_thread_(BrowserThread::UI, &message_loop_),
-        provider_(profile_.GetPrefs(), false) {
+      : provider_(profile_.GetPrefs(), false) {
   }
   virtual ~DefaultProviderTest() {
     provider_.ShutdownOnUIThread();
   }
 
  protected:
-  base::MessageLoop message_loop_;
-  content::TestBrowserThread ui_thread_;
   TestingProfile profile_;
   content_settings::DefaultProvider provider_;
 };
 
 TEST_F(DefaultProviderTest, DefaultValues) {
   // Check setting defaults.
   EXPECT_EQ(CONTENT_SETTING_ALLOW,
             GetContentSetting(&provider_,
                               GURL(),
                               GURL(),
@@ skipping 206 matching lines @@
 
   EXPECT_EQ(CONTENT_SETTING_BLOCK,
             GetContentSetting(&otr_provider,
                               GURL(),
                               GURL(),
                               CONTENT_SETTINGS_TYPE_COOKIES,
                               std::string(),
                               true));
   otr_provider.ShutdownOnUIThread();
 }