[Sync] Move //sync to //components/sync.

sync/android/java/src/org/chromium/sync/signin/ChromeSigninController.java

-// Copyright 2013 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.
-
-package org.chromium.sync.signin;
-
-import android.accounts.Account;
-import android.content.Context;
-
-import org.chromium.base.ContextUtils;
-import org.chromium.sync.AndroidSyncSettings;
-
-/**
- * Caches the signed-in username in the app prefs.
- */
-public class ChromeSigninController {
-
-    public static final String TAG = "ChromeSigninController";
-
-    // Used by ChromeBackupAgent and for testing.
-    public static final String SIGNED_IN_ACCOUNT_KEY = "google.services.username";
-
-    private static final Object LOCK = new Object();
-
-    private static ChromeSigninController sChromeSigninController;
-
-    private final Context mApplicationContext;
-
-    private ChromeSigninController(Context context) {
-        mApplicationContext = context.getApplicationContext();
-        AndroidSyncSettings.updateAccount(context, getSignedInUser());
-    }
-
-    /**
-     * A factory method for the ChromeSigninController.
-     *
-     * @param context the ApplicationContext is retrieved from the context used as an argument.
-     * @return a singleton instance of the ChromeSigninController
-     */
-    public static ChromeSigninController get(Context context) {
-        synchronized (LOCK) {
-            if (sChromeSigninController == null) {
-                sChromeSigninController = new ChromeSigninController(context);
-            }
-        }
-        return sChromeSigninController;
-    }
-
-    public Account getSignedInUser() {
-        String syncAccountName = getSignedInAccountName();
-        if (syncAccountName == null) {
-            return null;
-        }
-        return AccountManagerHelper.createAccountFromName(syncAccountName);
-    }
-
-    public boolean isSignedIn() {
-        return getSignedInAccountName() != null;
-    }
-
-    public void setSignedInAccountName(String accountName) {
-        ContextUtils.getAppSharedPreferences().edit()
-                .putString(SIGNED_IN_ACCOUNT_KEY, accountName)
-                .apply();
-        // TODO(maxbogue): Move this to SigninManager.
-        AndroidSyncSettings.updateAccount(mApplicationContext, getSignedInUser());
-    }
-
-    public String getSignedInAccountName() {
-        return ContextUtils.getAppSharedPreferences().getString(SIGNED_IN_ACCOUNT_KEY, null);
-    }
-}