NTP4/apps page: fix page stickiness

chrome/browser/ui/webui/ntp/new_tab_page_handler.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/ui/webui/ntp/new_tab_page_handler.h"
-
-#include "base/bind.h"
-#include "base/bind_helpers.h"
-#include "base/memory/scoped_ptr.h"
-#include "chrome/browser/browser_process.h"
-#include "chrome/browser/profiles/profile.h"
-#include "chrome/browser/ui/webui/ntp/new_tab_ui.h"
-#include "chrome/common/pref_names.h"
-#include "components/browser_sync/browser/profile_sync_service.h"
-#include "components/pref_registry/pref_registry_syncable.h"
-#include "components/prefs/pref_service.h"
-#include "content/public/browser/web_ui.h"
-
-NewTabPageHandler::NewTabPageHandler() : page_switch_count_(0) {
-}
-
-NewTabPageHandler::~NewTabPageHandler() {}
-
-void NewTabPageHandler::RegisterMessages() {
-  web_ui()->RegisterMessageCallback("pageSelected",
-      base::Bind(&NewTabPageHandler::HandlePageSelected,
-                 base::Unretained(this)));
-}
-
-void NewTabPageHandler::HandlePageSelected(const base::ListValue* args) {
-  page_switch_count_++;
-
-  double page_id_double;
-  CHECK(args->GetDouble(0, &page_id_double));
-  int page_id = static_cast<int>(page_id_double);
-
-  double index_double;
-  CHECK(args->GetDouble(1, &index_double));
-  int index = static_cast<int>(index_double);
-
-  PrefService* prefs = Profile::FromWebUI(web_ui())->GetPrefs();
-  prefs->SetInteger(prefs::kNtpShownPage, page_id | index);
-}
-
-// static
-void NewTabPageHandler::RegisterProfilePrefs(
-    user_prefs::PrefRegistrySyncable* registry) {
-  // TODO(estade): should be syncable.
-  registry->RegisterIntegerPref(prefs::kNtpShownPage, APPS_PAGE_ID);
-}
-
-// static
-void NewTabPageHandler::GetLocalizedValues(Profile* profile,
-                                           base::DictionaryValue* values) {
-  values->SetInteger("apps_page_id", APPS_PAGE_ID);
-
-  PrefService* prefs = profile->GetPrefs();
-  int shown_page = prefs->GetInteger(prefs::kNtpShownPage);
-  values->SetInteger("shown_page_type", shown_page & ~INDEX_MASK);
-  values->SetInteger("shown_page_index", shown_page & INDEX_MASK);
-}