@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    addPreferencesFromResource(R.xml.site_settings_preferences);
    getActivity().setTitle(R.string.prefs_site_settings);

    mProtectedContentMenuAvailable = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;

    String autoplayTrialGroupName =
            FieldTrialList.findFullName("MediaElementGestureOverrideExperiment");
    mAutoplayMenuAvailable = autoplayTrialGroupName.startsWith("Enabled")
            || ChromeFeatureList.isEnabled(AUTOPLAY_MUTED_VIDEOS);

    String category = "";
    if (getArguments() != null) {
        category = getArguments().getString(SingleCategoryPreferences.EXTRA_CATEGORY, "");
        if (MEDIA_KEY.equals(category)) {
            mMediaSubMenu = true;
            getActivity().setTitle(findPreference(MEDIA_KEY).getTitle().toString());
        }
    }

    configurePreferences();
    updatePreferenceStates();
}
 

/**
 * Returns the instance that will use {@code context} to issue intents.
 *
 * Calling this method will create the instance if it does not yet exist.
 */
public static InvalidationController get(Context context) {
    synchronized (LOCK) {
        if (sInstance == null) {
            // The PageRevisitInstrumentation trial needs sessions invalidations to be on such
            // that local session data is current and can be used to perform checks.
            boolean requireInvalidationsForInstrumentation =
                    FieldTrialList.findFullName("PageRevisitInstrumentation").equals("Enabled");
            boolean canDisableSessionInvalidations = !requireInvalidationsForInstrumentation;

            boolean canUseGcmUpstream =
                    FieldTrialList.findFullName("InvalidationsGCMUpstream").equals("Enabled");
            sInstance = new InvalidationController(
                    context, canDisableSessionInvalidations, canUseGcmUpstream);
        }
        return sInstance;
    }
}
 

/**
 * Cache whether the Instant Apps feature is enabled.
 * This should only be called with the native library loaded.
 */
public void cacheInstantAppsEnabled() {
    Context context = ContextUtils.getApplicationContext();
    boolean isEnabled = false;
    boolean wasEnabled = isEnabled(context);
    CommandLine instance = CommandLine.getInstance();
    if (instance.hasSwitch(ChromeSwitches.DISABLE_APP_LINK)) {
        isEnabled = false;
    } else if (instance.hasSwitch(ChromeSwitches.ENABLE_APP_LINK)) {
        isEnabled = true;
    } else {
        String experiment = FieldTrialList.findFullName(INSTANT_APPS_EXPERIMENT_NAME);
        if (INSTANT_APPS_DISABLED_ARM.equals(experiment)) {
            isEnabled = false;
        } else if (INSTANT_APPS_ENABLED_ARM.equals(experiment)) {
            isEnabled = true;
        }
    }

    if (isEnabled != wasEnabled) {
        ChromePreferenceManager.getInstance(context).setCachedInstantAppsEnabled(isEnabled);
    }
}
 

/**
 * Returns the instance that will use {@code context} to issue intents.
 *
 * Calling this method will create the instance if it does not yet exist.
 */
public static InvalidationController get(Context context) {
    synchronized (LOCK) {
        if (sInstance == null) {
            // The PageRevisitInstrumentation trial needs sessions invalidations to be on such
            // that local session data is current and can be used to perform checks.
            boolean requireInvalidationsForInstrumentation =
                    FieldTrialList.findFullName("PageRevisitInstrumentation").equals("Enabled");
            // If the NTP is trying to suggest foreign tabs, then recieving invalidations is
            // vital, otherwise data is stale and less useful.
            boolean requireInvalidationsForSuggestions = ChromeFeatureList.isEnabled(
                    ChromeFeatureList.NTP_FOREIGN_SESSIONS_SUGGESTIONS);
            boolean canDisableSessionInvalidations = !requireInvalidationsForInstrumentation
                    && !requireInvalidationsForSuggestions;

            boolean canUseGcmUpstream =
                    FieldTrialList.findFullName("InvalidationsGCMUpstream").equals("Enabled");
            sInstance = new InvalidationController(
                    context, canDisableSessionInvalidations, canUseGcmUpstream);
        }
        return sInstance;
    }
}
 

/**
 * Returns the instance that will use {@code context} to issue intents.
 *
 * Calling this method will create the instance if it does not yet exist.
 */
public static InvalidationController get(Context context) {
    synchronized (LOCK) {
        if (sInstance == null) {
            // The PageRevisitInstrumentation trial needs sessions invalidations to be on such
            // that local session data is current and can be used to perform checks.
            boolean requireInvalidationsForInstrumentation =
                    FieldTrialList.findFullName("PageRevisitInstrumentation").equals("Enabled");
            // If the NTP is trying to suggest foreign tabs, then recieving invalidations is
            // vital, otherwise data is stale and less useful.
            boolean requireInvalidationsForSuggestions = ChromeFeatureList.isEnabled(
                    ChromeFeatureList.NTP_FOREIGN_SESSIONS_SUGGESTIONS);
            boolean canDisableSessionInvalidations = !requireInvalidationsForInstrumentation
                    && !requireInvalidationsForSuggestions;

            sInstance = new InvalidationController(context, canDisableSessionInvalidations);
        }
        return sInstance;
    }
}
 

/**
 * @return true if the data use tracking started UI (snackbar) should be shown.
 */
public static boolean shouldShowDataUseStartedUI() {
    // UI should be shown only when field trial is active, not disabled in Finch and in
    // non-roaming-cellular connection.
    return FieldTrialList.trialExists(DATA_USE_FIELD_TRIAL)
            && !DISABLE_DATA_USE_UI_PARAM_VALUE.equals(
                       VariationsAssociatedData.getVariationParamValue(
                               DATA_USE_FIELD_TRIAL, DISABLE_DATA_USE_STARTED_UI_PARAM))
            && nativeIsNonRoamingCellularConnection();
}
 

/**
 * @return true if the data use tracking ended UI (snackbar or interstitial) should be shown.
 */
public static boolean shouldShowDataUseEndedUI() {
    // UI should be shown only when field trial is active, not disabled in Finch and in
    // non-roaming-cellular connection.
    return FieldTrialList.trialExists(DATA_USE_FIELD_TRIAL)
            && !DISABLE_DATA_USE_UI_PARAM_VALUE.equals(
                       VariationsAssociatedData.getVariationParamValue(
                               DATA_USE_FIELD_TRIAL, DISABLE_DATA_USE_ENDED_UI_PARAM))
            && nativeIsNonRoamingCellularConnection();
}
 

private void startModerateBindingManagementIfNeeded() {
    // Moderate binding doesn't apply to low end devices.
    if (SysUtils.isLowEndDevice()) return;

    boolean moderateBindingTillBackgrounded =
            FieldTrialList.findFullName("ModerateBindingOnBackgroundTabCreation")
                    .equals("Enabled");
    ChildProcessLauncher.startModerateBindingManagement(
            mAppContext, moderateBindingTillBackgrounded);
}
 

/**
 * @return true if the data use tracking started UI (snackbar) should be shown.
 */
public static boolean shouldShowDataUseStartedUI() {
    // UI should be shown only when field trial is active, not disabled in Finch and in
    // non-roaming-cellular connection.
    return FieldTrialList.trialExists(DATA_USE_FIELD_TRIAL)
            && !DISABLE_DATA_USE_UI_PARAM_VALUE.equals(
                       VariationsAssociatedData.getVariationParamValue(
                               DATA_USE_FIELD_TRIAL, DISABLE_DATA_USE_STARTED_UI_PARAM))
            && nativeIsNonRoamingCellularConnection();
}
 

/**
 * @return true if the data use tracking ended UI (snackbar or interstitial) should be shown.
 */
public static boolean shouldShowDataUseEndedUI() {
    // UI should be shown only when field trial is active, not disabled in Finch and in
    // non-roaming-cellular connection.
    return FieldTrialList.trialExists(DATA_USE_FIELD_TRIAL)
            && !DISABLE_DATA_USE_UI_PARAM_VALUE.equals(
                       VariationsAssociatedData.getVariationParamValue(
                               DATA_USE_FIELD_TRIAL, DISABLE_DATA_USE_ENDED_UI_PARAM))
            && nativeIsNonRoamingCellularConnection();
}
 

private void startModerateBindingManagementIfNeeded() {
    // Moderate binding doesn't apply to low end devices.
    if (SysUtils.isLowEndDevice()) return;

    boolean moderateBindingTillBackgrounded =
            FieldTrialList.findFullName("ModerateBindingOnBackgroundTabCreation")
                    .equals("Enabled");
    ChildProcessLauncher.startModerateBindingManagement(
            mAppContext, moderateBindingTillBackgrounded);
}
 

/**
 * Caches which flavor of Herb the user prefers from native.
 */
private static void cacheHerbFlavor() {
    Context context = ContextUtils.getApplicationContext();
    if (isHerbDisallowed(context)) return;

    String oldFlavor = getHerbFlavor();

    // Check the experiment value before the command line to put the user in the correct group.
    // The first clause does the null checks so so we can freely use the startsWith() function.
    String newFlavor = FieldTrialList.findFullName(HERB_EXPERIMENT_NAME);
    Log.d(TAG, "Experiment flavor: " + newFlavor);
    if (!TextUtils.isEmpty(newFlavor)
            && newFlavor.startsWith(ChromeSwitches.HERB_FLAVOR_ELDERBERRY)) {
        newFlavor = ChromeSwitches.HERB_FLAVOR_ELDERBERRY;
    } else {
        newFlavor = ChromeSwitches.HERB_FLAVOR_DISABLED;
    }

    CommandLine instance = CommandLine.getInstance();
    if (instance.hasSwitch(ChromeSwitches.HERB_FLAVOR_DISABLED_SWITCH)) {
        newFlavor = ChromeSwitches.HERB_FLAVOR_DISABLED;
    } else if (instance.hasSwitch(ChromeSwitches.HERB_FLAVOR_ELDERBERRY_SWITCH)) {
        newFlavor = ChromeSwitches.HERB_FLAVOR_ELDERBERRY;
    }

    Log.d(TAG, "Caching flavor: " + newFlavor);
    sCachedHerbFlavor = newFlavor;

    if (!TextUtils.equals(oldFlavor, newFlavor)) {
        ChromePreferenceManager.getInstance(context).setCachedHerbFlavor(newFlavor);
    }
}
 

/**
 * @return true if the data use tracking started UI (snackbar) should be shown.
 */
public static boolean shouldShowDataUseStartedUI() {
    // UI should be shown only when field trial is active, not disabled in Finch and in
    // non-roaming-cellular connection.
    return FieldTrialList.trialExists(DATA_USE_FIELD_TRIAL)
            && !DISABLE_DATA_USE_UI_PARAM_VALUE.equals(
                       VariationsAssociatedData.getVariationParamValue(
                               DATA_USE_FIELD_TRIAL, DISABLE_DATA_USE_STARTED_UI_PARAM))
            && nativeIsNonRoamingCellularConnection();
}
 

/**
 * @return true if the data use tracking ended UI (snackbar or interstitial) should be shown.
 */
public static boolean shouldShowDataUseEndedUI() {
    // UI should be shown only when field trial is active, not disabled in Finch and in
    // non-roaming-cellular connection.
    return FieldTrialList.trialExists(DATA_USE_FIELD_TRIAL)
            && !DISABLE_DATA_USE_UI_PARAM_VALUE.equals(
                       VariationsAssociatedData.getVariationParamValue(
                               DATA_USE_FIELD_TRIAL, DISABLE_DATA_USE_ENDED_UI_PARAM))
            && nativeIsNonRoamingCellularConnection();
}
 

/**
 * Caches which flavor of Herb the user prefers from native.
 */
private static void cacheHerbFlavor() {
    Context context = ContextUtils.getApplicationContext();
    if (isHerbDisallowed(context)) return;

    String oldFlavor = getHerbFlavor();

    // Check the experiment value before the command line to put the user in the correct group.
    // The first clause does the null checks so so we can freely use the startsWith() function.
    String newFlavor = FieldTrialList.findFullName(HERB_EXPERIMENT_NAME);
    Log.d(TAG, "Experiment flavor: " + newFlavor);
    if (!TextUtils.isEmpty(newFlavor)
            && newFlavor.startsWith(ChromeSwitches.HERB_FLAVOR_ELDERBERRY)) {
        newFlavor = ChromeSwitches.HERB_FLAVOR_ELDERBERRY;
    } else {
        newFlavor = ChromeSwitches.HERB_FLAVOR_DISABLED;
    }

    CommandLine instance = CommandLine.getInstance();
    if (instance.hasSwitch(ChromeSwitches.HERB_FLAVOR_DISABLED_SWITCH)) {
        newFlavor = ChromeSwitches.HERB_FLAVOR_DISABLED;
    } else if (instance.hasSwitch(ChromeSwitches.HERB_FLAVOR_ELDERBERRY_SWITCH)) {
        newFlavor = ChromeSwitches.HERB_FLAVOR_ELDERBERRY;
    }

    Log.d(TAG, "Caching flavor: " + newFlavor);
    sCachedHerbFlavor = newFlavor;

    if (!TextUtils.equals(oldFlavor, newFlavor)) {
        ChromePreferenceManager.getInstance().setCachedHerbFlavor(newFlavor);
    }
}
 

/**
 * Caches which flavor of Herb the user prefers from native.
 */
private static void cacheHerbFlavor() {
    Context context = ContextUtils.getApplicationContext();
    if (isHerbDisallowed(context)) return;

    String oldFlavor = getHerbFlavor();

    // Check the experiment value before the command line to put the user in the correct group.
    // The first clause does the null checks so so we can freely use the startsWith() function.
    String newFlavor = FieldTrialList.findFullName(HERB_EXPERIMENT_NAME);
    Log.d(TAG, "Experiment flavor: " + newFlavor);
    if (TextUtils.isEmpty(newFlavor)
            || newFlavor.startsWith(ChromeSwitches.HERB_FLAVOR_CONTROL)
            || newFlavor.startsWith(ChromeSwitches.HERB_FLAVOR_DEFAULT)) {
        newFlavor = ChromeSwitches.HERB_FLAVOR_DISABLED;
    } else if (newFlavor.startsWith(ChromeSwitches.HERB_FLAVOR_ANISE)) {
        newFlavor = ChromeSwitches.HERB_FLAVOR_ANISE;
    } else if (newFlavor.startsWith(ChromeSwitches.HERB_FLAVOR_BASIL)) {
        newFlavor = ChromeSwitches.HERB_FLAVOR_BASIL;
    } else if (newFlavor.startsWith(ChromeSwitches.HERB_FLAVOR_CHIVE)) {
        newFlavor = ChromeSwitches.HERB_FLAVOR_CHIVE;
    } else if (newFlavor.startsWith(ChromeSwitches.HERB_FLAVOR_DILL)) {
        newFlavor = ChromeSwitches.HERB_FLAVOR_DILL;
    } else if (newFlavor.startsWith(ChromeSwitches.HERB_FLAVOR_ELDERBERRY)) {
        newFlavor = ChromeSwitches.HERB_FLAVOR_ELDERBERRY;
    }

    CommandLine instance = CommandLine.getInstance();
    if (instance.hasSwitch(ChromeSwitches.HERB_FLAVOR_DISABLED_SWITCH)) {
        newFlavor = ChromeSwitches.HERB_FLAVOR_DISABLED;
    } else if (instance.hasSwitch(ChromeSwitches.HERB_FLAVOR_ANISE_SWITCH)) {
        newFlavor = ChromeSwitches.HERB_FLAVOR_ANISE;
    } else if (instance.hasSwitch(ChromeSwitches.HERB_FLAVOR_BASIL_SWITCH)) {
        newFlavor = ChromeSwitches.HERB_FLAVOR_BASIL;
    } else if (instance.hasSwitch(ChromeSwitches.HERB_FLAVOR_CHIVE_SWITCH)) {
        newFlavor = ChromeSwitches.HERB_FLAVOR_CHIVE;
    } else if (instance.hasSwitch(ChromeSwitches.HERB_FLAVOR_DILL_SWITCH)) {
        newFlavor = ChromeSwitches.HERB_FLAVOR_DILL;
    } else if (instance.hasSwitch(ChromeSwitches.HERB_FLAVOR_ELDERBERRY_SWITCH)) {
        newFlavor = ChromeSwitches.HERB_FLAVOR_ELDERBERRY;
    }

    Log.d(TAG, "Caching flavor: " + newFlavor);
    sCachedHerbFlavor = newFlavor;

    if (!TextUtils.equals(oldFlavor, newFlavor)) {
        ChromePreferenceManager.getInstance(context).setCachedHerbFlavor(newFlavor);
    }
}
 

protected boolean shouldShowDataReductionPage() {
    return !DataReductionProxySettings.getInstance().isDataReductionProxyManaged()
            && FieldTrialList.findFullName("DataReductionProxyFREPromo").startsWith("Enabled");
}
 

protected boolean shouldShowDataReductionPage() {
    return !DataReductionProxySettings.getInstance().isDataReductionProxyManaged()
            && FieldTrialList.findFullName("DataReductionProxyFREPromo").startsWith("Enabled");
}
 

protected boolean shouldShowDataReductionPage() {
    return !DataReductionProxySettings.getInstance().isDataReductionProxyManaged()
            && FieldTrialList.findFullName("DataReductionProxyFREPromo").startsWith("Enabled");
}