[Android] Upstream ChromeNativePreferences as PrefServiceBridge

chrome/browser/android/preferences/pref_service_bridge.cc

+// Copyright 2014 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/android/preferences/pref_service_bridge.h"
+
+#include <jni.h>
+
+#include "base/android/build_info.h"
+#include "base/android/jni_android.h"
+#include "base/android/jni_string.h"
+#include "base/android/jni_weak_ref.h"
+#include "base/files/file_path.h"
+#include "base/files/file_util.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/prefs/pref_service.h"
+#include "base/strings/string_util.h"
+#include "base/values.h"
+#include "chrome/browser/browser_process.h"
+#include "chrome/browser/browsing_data/browsing_data_helper.h"
+#include "chrome/browser/browsing_data/browsing_data_remover.h"
+#include "chrome/browser/content_settings/host_content_settings_map.h"
+#include "chrome/browser/net/prediction_options.h"
+#include "chrome/browser/prefs/incognito_mode_prefs.h"
+#include "chrome/browser/profiles/profile_manager.h"
+#include "chrome/browser/translate/chrome_translate_client.h"
+#include "chrome/browser/ui/android/android_about_app_info.h"
+#include "chrome/common/chrome_version_info.h"
+#include "chrome/common/pref_names.h"
+#include "chrome/grit/locale_settings.h"
+#include "components/content_settings/core/common/content_settings.h"
+#include "components/content_settings/core/common/content_settings_pattern.h"
+#include "components/password_manager/core/common/password_manager_pref_names.h"
+#include "components/translate/core/browser/translate_prefs.h"
+#include "components/translate/core/common/translate_pref_names.h"
+#include "content/public/browser/browser_thread.h"
+#include "content/public/common/user_agent.h"
+#include "jni/PrefServiceBridge_jni.h"
+#include "ui/base/l10n/l10n_util.h"
+
+using base::android::AttachCurrentThread;
+using base::android::CheckException;
+using base::android::ConvertJavaStringToUTF8;
+using base::android::ConvertUTF8ToJavaString;
+using base::android::ScopedJavaLocalRef;
+using content::BrowserThread;
+
+namespace {
+
+enum NetworkPredictionOptions {
+  NETWORK_PREDICTION_ALWAYS,
+  NETWORK_PREDICTION_WIFI_ONLY,
+  NETWORK_PREDICTION_NEVER,
+};
+
+Profile* GetOriginalProfile() {
+  return ProfileManager::GetActiveUserProfile()->GetOriginalProfile();
+}
+
+bool GetBooleanForContentSetting(HostContentSettingsMap* content_settings,
+                                 ContentSettingsType type) {
+  switch (content_settings->GetDefaultContentSetting(type, NULL)) {
+    case CONTENT_SETTING_BLOCK:
+      return false;
+    case CONTENT_SETTING_ALLOW:
+      return true;
+    case CONTENT_SETTING_ASK:
+    default:
+      return true;
+  }
+}
+
+std::string GetStringForContentSettingsType(
+    ContentSetting content_setting) {
+  switch (content_setting) {
+    case CONTENT_SETTING_BLOCK:
+      return "block";
+    case CONTENT_SETTING_ALLOW:
+      return "allow";
+    case CONTENT_SETTING_ASK:
+      return "ask";
+    case CONTENT_SETTING_SESSION_ONLY:
+      return "session";
+    case CONTENT_SETTING_NUM_SETTINGS:
+      return "num_settings";
+    case CONTENT_SETTING_DEFAULT:
+    default:
+      return "default";
+  }
+}
+
+bool IsContentSettingManaged(HostContentSettingsMap* content_settings,
+                             ContentSettingsType content_settings_type) {
+  std::string source;
+  content_settings->GetDefaultContentSetting(content_settings_type, &source);
+  HostContentSettingsMap::ProviderType provider =
+      content_settings->GetProviderTypeFromSource(source);
+  return provider == HostContentSettingsMap::POLICY_PROVIDER;
+}
+
+void ReturnAbsoluteProfilePathValue(std::string path_value) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  JNIEnv* env = AttachCurrentThread();
+  ScopedJavaLocalRef<jstring> j_path_value =
+      ConvertUTF8ToJavaString(env, path_value);
+  Java_PrefServiceBridge_setProfilePathValue(env, j_path_value.obj());
+}
+
+void GetAbsolutePath(Profile* profile) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
+  if (profile) {
+    base::FilePath profile_path = profile->GetPath();
+    profile_path = base::MakeAbsoluteFilePath(profile_path);
+    if (!profile_path.empty()) {
+      BrowserThread::PostTask(
+          BrowserThread::UI, FROM_HERE,
+          base::Bind(&ReturnAbsoluteProfilePathValue, profile_path.value()));
+    }
+  }
+}
+
+PrefService* GetPrefService() {
+  return GetOriginalProfile()->GetPrefs();
+}
+
+static void EnsureConsistentGeolocationPreferences(Profile* profile) {
+  // On Android, we use the kGeolocationEnabled flag to control geolocation on a
+  // global basis, rather than the default geolocation host content setting,
+  // which is only used if no previously stored more specific host exception
+  // cannot be found.
+  //
+  // On Android, there is currently no UI to change this default setting, so it
+  // needs to default to ASK. Additionally, for users that have previously set
+  // the default to BLOCK, we set the preference to disable geolocation
+  // globally.
+
+  ContentSetting defaultSetting = profile->GetHostContentSettingsMap()->
+      GetDefaultContentSetting(CONTENT_SETTINGS_TYPE_GEOLOCATION, NULL);
+
+  if (defaultSetting == CONTENT_SETTING_ASK)
+    return;
+
+  profile->GetHostContentSettingsMap()->SetDefaultContentSetting(
+      CONTENT_SETTINGS_TYPE_GEOLOCATION, CONTENT_SETTING_ASK);
+
+  if (defaultSetting == CONTENT_SETTING_BLOCK) {
+    profile->GetPrefs()->SetBoolean(prefs::kGeolocationEnabled, false);
+  }
+}
+
+static void EnsureConsistentProtectedMediaIdentifierPreferences(
+    Profile* profile) {
+  // We use the kProtectedMediaIdentifierEnabled flag to control protected media
+  // identifier on a global basis.
+  //
+  // On Android, there is currently no UI to change this default setting, so it
+  // needs to default to ASK. Additionally, for users that have previously set
+  // the default to BLOCK, we set the preference to disable protected media
+  // identifier globally.
+  ContentSetting defaultSetting =
+      profile->GetHostContentSettingsMap()->
+      GetDefaultContentSetting(CONTENT_SETTINGS_TYPE_PROTECTED_MEDIA_IDENTIFIER,
+                               NULL);
+
+  if (defaultSetting == CONTENT_SETTING_ASK)
+    return;
+
+  profile->GetHostContentSettingsMap()->SetDefaultContentSetting(
+      CONTENT_SETTINGS_TYPE_PROTECTED_MEDIA_IDENTIFIER, CONTENT_SETTING_ASK);
+
+  if (defaultSetting == CONTENT_SETTING_BLOCK) {
+    profile->GetPrefs()->SetBoolean(prefs::kProtectedMediaIdentifierEnabled,
+                                    false);
+  }
+}
+
+}  // namespace
+
+// ----------------------------------------------------------------------------
+// Native JNI methods
+// ----------------------------------------------------------------------------
+
+static jboolean GetAcceptCookiesEnabled(JNIEnv* env, jobject obj) {
+  return GetBooleanForContentSetting(
+      GetOriginalProfile()->GetHostContentSettingsMap(),
+      CONTENT_SETTINGS_TYPE_COOKIES);
+}
+
+static jboolean GetAcceptCookiesManaged(JNIEnv* env, jobject obj) {
+  return IsContentSettingManaged(
+      GetOriginalProfile()->GetHostContentSettingsMap(),
+      CONTENT_SETTINGS_TYPE_COOKIES);
+}
+
+static jboolean GetRememberPasswordsEnabled(JNIEnv* env, jobject obj) {
+  return GetPrefService()->GetBoolean(
+      password_manager::prefs::kPasswordManagerSavingEnabled);
+}
+
+static jboolean GetRememberPasswordsManaged(JNIEnv* env, jobject obj) {
+  return GetPrefService()->IsManagedPreference(
+      password_manager::prefs::kPasswordManagerSavingEnabled);
+}
+
+static jboolean GetDoNotTrackEnabled(JNIEnv* env, jobject obj) {
+  return GetPrefService()->GetBoolean(prefs::kEnableDoNotTrack);
+}
+
+static jint GetNetworkPredictionOptions(JNIEnv* env, jobject obj) {
+  return GetPrefService()->GetInteger(prefs::kNetworkPredictionOptions);
+}
+
+static jboolean GetNetworkPredictionManaged(JNIEnv* env, jobject obj) {
+  return GetPrefService()->IsManagedPreference(
+      prefs::kNetworkPredictionOptions);
+}
+
+static jboolean GetPasswordEchoEnabled(JNIEnv* env, jobject obj) {
+  return GetPrefService()->GetBoolean(prefs::kWebKitPasswordEchoEnabled);
+}
+
+static jboolean GetPrintingEnabled(JNIEnv* env, jobject obj) {
+  return GetPrefService()->IsManagedPreference(prefs::kPrintingEnabled);
+}
+
+static jboolean GetTranslateEnabled(JNIEnv* env, jobject obj) {
+  return GetPrefService()->GetBoolean(prefs::kEnableTranslate);
+}
+
+static jboolean GetTranslateManaged(JNIEnv* env, jobject obj) {
+  return GetPrefService()->IsManagedPreference(prefs::kEnableTranslate);
+}
+
+static jboolean GetSearchSuggestEnabled(JNIEnv* env, jobject obj) {
+  return GetPrefService()->GetBoolean(prefs::kSearchSuggestEnabled);
+}
+
+static jboolean GetSearchSuggestManaged(JNIEnv* env, jobject obj) {
+  return GetPrefService()->IsManagedPreference(prefs::kSearchSuggestEnabled);
+}
+
+static jboolean GetProtectedMediaIdentifierEnabled(JNIEnv* env, jobject obj) {
+  Profile* profile = GetOriginalProfile();
+  EnsureConsistentProtectedMediaIdentifierPreferences(profile);
+  return GetPrefService()->GetBoolean(prefs::kProtectedMediaIdentifierEnabled);
+}
+
+static jboolean GetAllowLocationEnabled(JNIEnv* env, jobject obj) {
+  Profile* profile = GetOriginalProfile();
+  EnsureConsistentGeolocationPreferences(profile);
+  return GetPrefService()->GetBoolean(prefs::kGeolocationEnabled);
+}
+
+static jboolean GetAllowLocationManaged(JNIEnv* env, jobject obj) {
+  return IsContentSettingManaged(
+      GetOriginalProfile()->GetHostContentSettingsMap(),
+      CONTENT_SETTINGS_TYPE_GEOLOCATION);
+}
+
+static jboolean GetResolveNavigationErrorEnabled(JNIEnv* env, jobject obj) {
+  return GetPrefService()->GetBoolean(prefs::kAlternateErrorPagesEnabled);
+}
+
+static jboolean GetResolveNavigationErrorManaged(JNIEnv* env, jobject obj) {
+  return GetPrefService()->IsManagedPreference(
+      prefs::kAlternateErrorPagesEnabled);
+}
+
+static jboolean GetCrashReportManaged(JNIEnv* env, jobject obj) {
+  return GetPrefService()->IsManagedPreference(
+      prefs::kCrashReportingEnabled);
+}
+
+static jboolean GetForceSafeSearch(JNIEnv* env, jobject obj) {
+  return GetPrefService()->GetBoolean(prefs::kForceSafeSearch);
+}
+
+static jint GetDefaultSupervisedUserFilteringBehavior(JNIEnv* env,
+                                                      jobject obj) {
+  return GetPrefService()->GetInteger(
+      prefs::kDefaultSupervisedUserFilteringBehavior);
+}
+
+static jboolean GetIncognitoModeEnabled(JNIEnv* env, jobject obj) {
+  PrefService* prefs = GetPrefService();
+  IncognitoModePrefs::Availability incognito_pref =
+      IncognitoModePrefs::GetAvailability(prefs);
+  DCHECK(incognito_pref == IncognitoModePrefs::ENABLED ||
+         incognito_pref == IncognitoModePrefs::DISABLED) <<
+             "Unsupported incognito mode preference: " << incognito_pref;
+  return incognito_pref != IncognitoModePrefs::DISABLED;
+}
+
+static jboolean GetIncognitoModeManaged(JNIEnv* env, jobject obj) {
+  return GetPrefService()->IsManagedPreference(
+      prefs::kIncognitoModeAvailability);
+}
+
+namespace {
+
+// Redirects a BrowsingDataRemover completion callback back into Java.
+class ClearBrowsingDataObserver : public BrowsingDataRemover::Observer {
+ public:
+  // |obj| is expected to be the object passed into ClearBrowsingData(); e.g. a
+  // ChromePreference.
+  ClearBrowsingDataObserver(JNIEnv* env, jobject obj)
+      : weak_chrome_native_preferences_(env, obj) {
+  }
+
+  virtual void OnBrowsingDataRemoverDone() override {
+    // Just as a BrowsingDataRemover deletes itself when done, we delete ourself
+    // when done.  No need to remove ourself as an observer given the lifetime
+    // of BrowsingDataRemover.
+    scoped_ptr<ClearBrowsingDataObserver> auto_delete(this);
+
+    JNIEnv* env = AttachCurrentThread();
+    if (weak_chrome_native_preferences_.get(env).is_null())
+      return;
+
+    Java_PrefServiceBridge_browsingDataCleared(
+        env, weak_chrome_native_preferences_.get(env).obj());
+  }
+
+ private:
+  JavaObjectWeakGlobalRef weak_chrome_native_preferences_;
+};
+}  // namespace
+
+static void ClearBrowsingData(JNIEnv* env, jobject obj, jboolean history,
+    jboolean cache, jboolean cookies_and_site_data, jboolean passwords,
+    jboolean form_data) {
+  // BrowsingDataRemover deletes itself.
+  BrowsingDataRemover* browsing_data_remover =
+      BrowsingDataRemover::CreateForPeriod(
+          GetOriginalProfile(),
+          static_cast<BrowsingDataRemover::TimePeriod>(
+              BrowsingDataRemover::EVERYTHING));
+  browsing_data_remover->AddObserver(new ClearBrowsingDataObserver(env, obj));
+
+  int remove_mask = 0;
+  if (history)
+    remove_mask |= BrowsingDataRemover::REMOVE_HISTORY;
+  if (cache)
+    remove_mask |= BrowsingDataRemover::REMOVE_CACHE;
+  if (cookies_and_site_data) {
+    remove_mask |= BrowsingDataRemover::REMOVE_COOKIES;
+    remove_mask |= BrowsingDataRemover::REMOVE_SITE_DATA;
+  }
+  if (passwords)
+    remove_mask |= BrowsingDataRemover::REMOVE_PASSWORDS;
+  if (form_data)
+    remove_mask |= BrowsingDataRemover::REMOVE_FORM_DATA;
+  browsing_data_remover->Remove(remove_mask,
+                                BrowsingDataHelper::UNPROTECTED_WEB);
+}
+
+static jboolean GetAllowCookiesEnabled(JNIEnv* env, jobject obj) {
+  HostContentSettingsMap* content_settings =
+      GetOriginalProfile()->GetHostContentSettingsMap();
+  return GetBooleanForContentSetting(
+      content_settings, CONTENT_SETTINGS_TYPE_COOKIES);
+}
+
+static void SetAllowCookiesEnabled(JNIEnv* env, jobject obj, jboolean allow) {
+  HostContentSettingsMap* host_content_settings_map =
+      GetOriginalProfile()->GetHostContentSettingsMap();
+  host_content_settings_map->SetDefaultContentSetting(
+      CONTENT_SETTINGS_TYPE_COOKIES,
+      allow ? CONTENT_SETTING_ALLOW : CONTENT_SETTING_BLOCK);
+}
+
+static void SetRememberPasswordsEnabled(JNIEnv* env, jobject obj,
+                                        jboolean allow) {
+  GetPrefService()->SetBoolean(
+      password_manager::prefs::kPasswordManagerSavingEnabled, allow);
+}
+
+static void SetProtectedMediaIdentifierEnabled(JNIEnv* env,
+                                               jobject obj,
+                                               jboolean is_enabled) {
+  GetPrefService()->SetBoolean(prefs::kProtectedMediaIdentifierEnabled,
+                               is_enabled);
+}
+
+static void SetAllowLocationEnabled(JNIEnv* env, jobject obj, jboolean allow) {
+  GetPrefService()->SetBoolean(prefs::kGeolocationEnabled, allow);
+}
+
+static void SetCrashReporting(JNIEnv* env, jobject obj, jboolean reporting) {
+  PrefService* local_state = g_browser_process->local_state();
+  local_state->SetBoolean(prefs::kCrashReportingEnabled, reporting);
+}
+
+static jboolean CanPredictNetworkActions(JNIEnv* env, jobject obj) {
+  return chrome_browser_net::CanPrefetchAndPrerenderUI(GetPrefService());
+}
+
+static void SetDoNotTrackEnabled(JNIEnv* env, jobject obj, jboolean allow) {
+  GetPrefService()->SetBoolean(prefs::kEnableDoNotTrack, allow);
+}
+
+static jstring GetSyncLastAccountName(JNIEnv* env, jobject obj) {
+  return ConvertUTF8ToJavaString(
+      env, GetPrefService()->GetString(prefs::kGoogleServicesLastUsername))
+      .Release();
+}
+
+static void SetTranslateEnabled(JNIEnv* env, jobject obj, jboolean enabled) {
+  GetPrefService()->SetBoolean(prefs::kEnableTranslate, enabled);
+}
+
+static void ResetTranslateDefaults(JNIEnv* env, jobject obj) {
+  scoped_ptr<translate::TranslatePrefs> translate_prefs =
+      ChromeTranslateClient::CreateTranslatePrefs(GetPrefService());
+  translate_prefs->ResetToDefaults();
+}
+
+static jboolean GetJavaScriptManaged(JNIEnv* env, jobject obj) {
+  HostContentSettingsMap* content_settings =
+      GetOriginalProfile()->GetHostContentSettingsMap();
+  return IsContentSettingManaged(
+      content_settings, CONTENT_SETTINGS_TYPE_JAVASCRIPT);
+}
+
+static void SetJavaScriptEnabled(JNIEnv* env, jobject obj, jboolean enabled) {
+  GetPrefService()->SetBoolean(prefs::kWebKitJavascriptEnabled, enabled);
+}
+
+static jboolean GetJavaScriptEnabled(JNIEnv* env, jobject obj) {
+  // The user pref for Javascript is stored in kWebKitJavascriptEnabled for
+  // historical reasons, but the content setting is where a possibly managed
+  // value will be enforced.
+  HostContentSettingsMap* content_settings =
+      GetOriginalProfile()->GetHostContentSettingsMap();
+
+  jboolean javascript_enabled = GetBooleanForContentSetting(
+      content_settings, CONTENT_SETTINGS_TYPE_JAVASCRIPT);
+  if (!GetJavaScriptManaged(env, obj)) {
+    javascript_enabled &= GetPrefService()->GetBoolean(
+        prefs::kWebKitJavascriptEnabled);
+  }
+  return javascript_enabled;
+}
+
+static void SetPasswordEchoEnabled(JNIEnv* env,
+                                   jobject obj,
+                                   jboolean passwordEchoEnabled) {
+  GetPrefService()->SetBoolean(prefs::kWebKitPasswordEchoEnabled,
+                               passwordEchoEnabled);
+}
+
+static jboolean GetAllowPopupsEnabled(JNIEnv* env, jobject obj) {
+  HostContentSettingsMap* content_settings =
+      GetOriginalProfile()->GetHostContentSettingsMap();
+  return GetBooleanForContentSetting(content_settings,
+      CONTENT_SETTINGS_TYPE_POPUPS);
+}
+
+static jboolean GetAllowPopupsManaged(JNIEnv* env, jobject obj) {
+  HostContentSettingsMap* content_settings =
+      GetOriginalProfile()->GetHostContentSettingsMap();
+  return IsContentSettingManaged(content_settings,
+                                 CONTENT_SETTINGS_TYPE_POPUPS);
+}
+
+static void SetAllowPopupsEnabled(JNIEnv* env, jobject obj, jboolean allow) {
+  HostContentSettingsMap* host_content_settings_map =
+      GetOriginalProfile()->GetHostContentSettingsMap();
+  host_content_settings_map->SetDefaultContentSetting(
+      CONTENT_SETTINGS_TYPE_POPUPS,
+      allow ? CONTENT_SETTING_ALLOW : CONTENT_SETTING_BLOCK);
+}
+
+static jboolean GetAutologinEnabled(JNIEnv* env, jobject obj) {
+  return GetPrefService()->GetBoolean(prefs::kAutologinEnabled);
+}
+
+static void SetAutologinEnabled(JNIEnv* env, jobject obj,
+                                jboolean autologinEnabled) {
+  GetPrefService()->SetBoolean(prefs::kAutologinEnabled, autologinEnabled);
+}
+
+static void SetPopupException(JNIEnv* env, jobject obj, jstring pattern,
+                              jboolean allow) {
+  HostContentSettingsMap* host_content_settings_map =
+      GetOriginalProfile()->GetHostContentSettingsMap();
+  host_content_settings_map->SetContentSetting(
+      ContentSettingsPattern::FromString(ConvertJavaStringToUTF8(env, pattern)),
+      ContentSettingsPattern::Wildcard(),
+      CONTENT_SETTINGS_TYPE_POPUPS,
+      "",
+      allow ? CONTENT_SETTING_ALLOW : CONTENT_SETTING_BLOCK);
+}
+
+static void RemovePopupException(JNIEnv* env, jobject obj, jstring pattern) {
+  HostContentSettingsMap* host_content_settings_map =
+      GetOriginalProfile()->GetHostContentSettingsMap();
+  host_content_settings_map->SetContentSetting(
+      ContentSettingsPattern::FromString(ConvertJavaStringToUTF8(env, pattern)),
+      ContentSettingsPattern::Wildcard(),
+      CONTENT_SETTINGS_TYPE_POPUPS,
+      "",
+      CONTENT_SETTING_DEFAULT);
+}
+
+static void GetPopupExceptions(JNIEnv* env, jobject obj, jobject list) {
+  HostContentSettingsMap* host_content_settings_map =
+      GetOriginalProfile()->GetHostContentSettingsMap();
+  ContentSettingsForOneType entries;
+  host_content_settings_map->GetSettingsForOneType(
+      CONTENT_SETTINGS_TYPE_POPUPS, "", &entries);
+  for (size_t i = 0; i < entries.size(); ++i) {
+    Java_PrefServiceBridge_insertPopupExceptionToList(
+        env, list,
+        ConvertUTF8ToJavaString(
+            env, entries[i].primary_pattern.ToString()).obj(),
+        ConvertUTF8ToJavaString(
+            env, GetStringForContentSettingsType(entries[i].setting)).obj(),
+        ConvertUTF8ToJavaString(env, entries[i].source).obj());
+  }
+}
+
+static void SetSearchSuggestEnabled(JNIEnv* env, jobject obj,
+                                    jboolean enabled) {
+  GetPrefService()->SetBoolean(prefs::kSearchSuggestEnabled, enabled);
+}
+
+static jstring GetContextualSearchPreference(JNIEnv* env, jobject obj) {
+  return ConvertUTF8ToJavaString(
+      env, GetPrefService()->GetString(prefs::kContextualSearchEnabled)).
+          Release();
+}
+
+static void SetContextualSearchPreference(JNIEnv* env, jobject obj,
+                                          jstring pref) {
+  GetPrefService()->SetString(prefs::kContextualSearchEnabled,
+      ConvertJavaStringToUTF8(env, pref));
+}
+
+static void SetNetworkPredictionOptions(JNIEnv* env, jobject obj, int option) {
+  GetPrefService()->SetInteger(prefs::kNetworkPredictionOptions, option);
+}
+
+static jboolean NetworkPredictionEnabledHasUserSetting(JNIEnv* env,
+                                                       jobject obj) {
+  return GetPrefService()->GetUserPrefValue(
+      prefs::kNetworkPredictionEnabled) != NULL;
+}
+
+static jboolean NetworkPredictionOptionsHasUserSetting(JNIEnv* env,
+                                                       jobject obj) {
+  return GetPrefService()->GetUserPrefValue(
+      prefs::kNetworkPredictionOptions) != NULL;
+}
+
+static jboolean GetNetworkPredictionEnabledUserPrefValue(JNIEnv* env,
+                                                         jobject obj) {
+  const base::Value* network_prediction_enabled =
+      GetPrefService()->GetUserPrefValue(prefs::kNetworkPredictionEnabled);
+  DCHECK(network_prediction_enabled);
+  bool value = false;
+  DCHECK(network_prediction_enabled->GetAsBoolean(&value));
+  return value;
+}
+
+static void SetResolveNavigationErrorEnabled(JNIEnv* env, jobject obj,
+                                             jboolean enabled) {
+  GetPrefService()->SetBoolean(prefs::kAlternateErrorPagesEnabled, enabled);
+}
+
+static jboolean GetFirstRunEulaAccepted(JNIEnv* env, jobject obj) {
+  return g_browser_process->local_state()->GetBoolean(prefs::kEulaAccepted);
+}
+
+static void SetEulaAccepted(JNIEnv* env, jobject obj) {
+  g_browser_process->local_state()->SetBoolean(prefs::kEulaAccepted, true);
+}
+
+static void ResetAcceptLanguages(JNIEnv* env,
+                                 jobject obj,
+                                 jstring default_locale) {
+  std::string accept_languages(l10n_util::GetStringUTF8(IDS_ACCEPT_LANGUAGES));
+  std::string locale_string(ConvertJavaStringToUTF8(env, default_locale));
+
+  PrependToAcceptLanguagesIfNecessary(locale_string, &accept_languages);
+  GetPrefService()->SetString(prefs::kAcceptLanguages, accept_languages);
+}
+
+void PrependToAcceptLanguagesIfNecessary(std::string locale,
+                                         std::string* accept_languages) {
+  if (locale.size() != 5u || locale[2] != '_')  // not well-formed
+    return;
+
+  std::string language(locale.substr(0, 2));
+  std::string region(locale.substr(3, 2));
+
+  // Java mostly follows ISO-639-1 and ICU, except for the following three.
+  // See documentation on java.util.Locale constructor for more.
+  if (language == "iw") {
+    language = "he";
+  } else if (language == "ji") {
+    language = "yi";
+  } else if (language == "in") {
+    language = "id";
+  }
+
+  std::string language_region(language + "-" + region);
+
+  if (accept_languages->find(language_region) == std::string::npos) {
+    std::vector<std::string> parts;
+    parts.push_back(language_region);
+    // If language is not in the accept languages list, also add language code.
+    if (accept_languages->find(language + ",") == std::string::npos &&
+        !std::equal(language.rbegin(), language.rend(),
+                    accept_languages->rbegin()))
+      parts.push_back(language);
+    parts.push_back(*accept_languages);
+    *accept_languages = JoinString(parts, ',');
+  }
+}
+
+// Sends all information about the different versions to Java.
+// From browser_about_handler.cc
+static jobject GetAboutVersionStrings(JNIEnv* env, jobject obj) {
+  chrome::VersionInfo version_info;
+  std::string os_version = version_info.OSType();
+  os_version += " " + AndroidAboutAppInfo::GetOsInfo();
+
+  base::android::BuildInfo* android_build_info =
+        base::android::BuildInfo::GetInstance();
+  std::string application(android_build_info->package_label());
+  application.append(" ");
+  application.append(version_info.Version());
+
+  // OK to release, returning to Java.
+  return Java_PrefServiceBridge_createAboutVersionStrings(
+      env,
+      ConvertUTF8ToJavaString(env, application).obj(),
+      ConvertUTF8ToJavaString(env, content::GetWebKitVersion()).obj(),
+      ConvertUTF8ToJavaString(
+          env, AndroidAboutAppInfo::GetJavaScriptVersion()).obj(),
+      ConvertUTF8ToJavaString(env, os_version).obj()).Release();
+}
+
+static void SetPathValuesForAboutChrome(JNIEnv* env, jobject obj) {
+  BrowserThread::PostTask(BrowserThread::FILE, FROM_HERE,
+                          base::Bind(&GetAbsolutePath, GetOriginalProfile()));
+}
+
+static jstring GetSupervisedUserCustodianName(JNIEnv* env, jobject obj) {
+  return ConvertUTF8ToJavaString(
+      env, GetPrefService()->GetString(prefs::kSupervisedUserCustodianName))
+      .Release();
+}
+
+static jstring GetSupervisedUserCustodianEmail(JNIEnv* env, jobject obj) {
+  return ConvertUTF8ToJavaString(
+      env, GetPrefService()->GetString(prefs::kSupervisedUserCustodianEmail))
+      .Release();
+}
+
+static jstring GetSupervisedUserCustodianProfileImageURL(JNIEnv* env,
+                                                         jobject obj) {
+  return ConvertUTF8ToJavaString(
+      env,
+      GetPrefService()->GetString(
+          prefs::kSupervisedUserCustodianProfileImageURL)).Release();
+}
+
+static jstring GetSupervisedUserSecondCustodianName(JNIEnv* env, jobject obj) {
+  return ConvertUTF8ToJavaString(
+      env,
+      GetPrefService()->GetString(prefs::kSupervisedUserSecondCustodianName))
+      .Release();
+}
+
+static jstring GetSupervisedUserSecondCustodianEmail(JNIEnv* env, jobject obj) {
+  return ConvertUTF8ToJavaString(
+      env,
+      GetPrefService()->GetString(prefs::kSupervisedUserSecondCustodianEmail))
+      .Release();
+}
+
+static jstring GetSupervisedUserSecondCustodianProfileImageURL(JNIEnv* env,
+                                                               jobject obj) {
+  return ConvertUTF8ToJavaString(
+      env,
+      GetPrefService()->GetString(
+          prefs::kSupervisedUserSecondCustodianProfileImageURL)).Release();
+}
+
+bool RegisterPrefServiceBridge(JNIEnv* env) {
+  return RegisterNativesImpl(env);
+}