Split testing_pref_service.h/.cc into two parts, generic vs. Chrome-specific.

chrome/browser/chromeos/settings/device_settings_provider_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 "chrome/browser/chromeos/settings/device_settings_provider.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/file_util.h"
 #include "base/path_service.h"
 #include "base/test/scoped_path_override.h"
 #include "base/values.h"
 #include "chrome/browser/chromeos/cros/cros_library.h"
 #include "chrome/browser/chromeos/settings/cros_settings_names.h"
 #include "chrome/browser/chromeos/settings/device_settings_test_helper.h"
 #include "chrome/browser/policy/proto/chrome_device_policy.pb.h"
 #include "chrome/browser/policy/proto/device_management_backend.pb.h"
 #include "chrome/common/chrome_paths.h"
+#include "chrome/test/base/scoped_testing_local_state.h"
 #include "chrome/test/base/testing_browser_process.h"
-#include "chrome/test/base/testing_pref_service.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace em = enterprise_management;
 
 namespace chromeos {
 
 using ::testing::AnyNumber;
 using ::testing::Mock;
 using ::testing::_;
@@ skipping 224 matching lines @@
 
   // Verify that migration has kicked in.
   const base::Value* saved_value = provider_->Get(kStatsReportingPref);
   ASSERT_TRUE(saved_value);
   bool bool_value;
   EXPECT_TRUE(saved_value->GetAsBoolean(&bool_value));
   EXPECT_FALSE(bool_value);
 }
 
 } // namespace chromeos