Move remaining non-test, non-Chrome-specific Prefs code to base/prefs/.

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.h"
+#include "base/prefs/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/browser/prefs/pref_service.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/test/base/testing_pref_service.h"
 #include "chrome/test/base/testing_profile.h"
 #include "content/public/test/test_browser_thread.h"
 #include "googleurl/src/gurl.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using ::testing::_;
 using content::BrowserThread;
 
@@ skipping 229 matching lines @@
 
   EXPECT_EQ(CONTENT_SETTING_BLOCK,
             GetContentSetting(&otr_provider,
                               GURL(),
                               GURL(),
                               CONTENT_SETTINGS_TYPE_COOKIES,
                               std::string(),
                               true));
   otr_provider.ShutdownOnUIThread();
 }