ntp: remove ShownSectionHandler and all references to it

chrome/browser/ui/webui/ntp/shown_sections_handler_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 "chrome/browser/ui/webui/ntp/shown_sections_handler.h"
-
-#include "base/memory/scoped_ptr.h"
-#include "chrome/browser/prefs/pref_value_store.h"
-#include "chrome/common/json_pref_store.h"
-#include "chrome/common/pref_names.h"
-#include "chrome/test/base/testing_pref_service.h"
-#include "testing/gtest/include/gtest/gtest.h"
-
-class ShownSectionsHandlerTest : public testing::Test {
-};
-
-namespace {
-
-int MigratePrefValue(PrefService* prefs, int starting_value) {
-  prefs->SetInteger(prefs::kNTPShownSections, starting_value);
-  ShownSectionsHandler::MigrateUserPrefs(prefs, 1, 3);
-  return prefs->GetInteger(prefs::kNTPShownSections);
-}
-
-}  // namespace
-
-TEST_F(ShownSectionsHandlerTest, MigrateUserPrefs) {
-  scoped_ptr<PrefService> pref(new TestingPrefService);
-
-  pref->RegisterIntegerPref(prefs::kNTPShownSections, 0);
-
-  EXPECT_EQ(APPS, MigratePrefValue(pref.get(), APPS));
-  EXPECT_EQ(THUMB, MigratePrefValue(pref.get(), THUMB));
-  EXPECT_EQ(APPS, MigratePrefValue(pref.get(), APPS | THUMB));
-
-  // 2 is not currently used, but older state may contain it and we should do
-  // something reasonable.
-  EXPECT_EQ(THUMB, MigratePrefValue(pref.get(), 3));
-
-  // 0 can't correspond to any section, but we should still do something
-  // reasonable.
-  EXPECT_EQ(THUMB, MigratePrefValue(pref.get(), 0));
-}