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

sync/android/java/src/org/chromium/sync/notifier/InvalidationClientNameProvider.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.notifier;
-
-/**
- * An injectable singleton that provides an invalidation client with an appropriate unique name.
- *
- * This singleton will always provide a somewhat reasonable name.  With proper support from outside
- * components, it will be able to provide a name that is consistent across restarts.
- */
-public class InvalidationClientNameProvider {
-    private static final Object LOCK = new Object();
-
-    private static InvalidationClientNameProvider sInstance;
-
-    private final Object mLock;
-
-    private InvalidationClientNameGenerator mGenerator;
-
-    private byte[] mUniqueId;
-
-    public static InvalidationClientNameProvider get() {
-        synchronized (LOCK) {
-            if (sInstance == null) {
-                sInstance = new InvalidationClientNameProvider();
-            }
-            return sInstance;
-        }
-    }
-
-    InvalidationClientNameProvider() {
-        mLock = new Object();
-        mGenerator = new RandomizedInvalidationClientNameGenerator();
-    }
-
-    /** Returns a consistent unique string of bytes for use as an invalidator client ID. */
-    public byte[] getInvalidatorClientName() {
-        synchronized (mLock) {
-            if (mUniqueId == null) {
-                mUniqueId = mGenerator.generateInvalidatorClientName();
-            }
-            return mUniqueId;
-        }
-    }
-
-    public void setPreferredClientNameGenerator(InvalidationClientNameGenerator generator) {
-        mGenerator = generator;
-    }
-}