[Android] Refactor: move files to chrome/browser/notifications/channels

chrome/android/java/src/org/chromium/chrome/browser/notifications/ChannelsUpdater.java

Index: chrome/android/java/src/org/chromium/chrome/browser/notifications/ChannelsUpdater.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/notifications/ChannelsUpdater.java b/chrome/android/java/src/org/chromium/chrome/browser/notifications/ChannelsUpdater.java
deleted file mode 100644
index 8a7a1a95eceb3acdf8c70d5c9811495737877357..0000000000000000000000000000000000000000
--- a/chrome/android/java/src/org/chromium/chrome/browser/notifications/ChannelsUpdater.java
+++ /dev/null
@@ -1,71 +0,0 @@
-// Copyright 2017 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.chrome.browser.notifications;
-
-import android.app.NotificationManager;
-import android.content.Context;
-import android.content.SharedPreferences;
-
-import org.chromium.base.BuildInfo;
-import org.chromium.base.ContextUtils;
-import org.chromium.base.VisibleForTesting;
-
-/**
- * Contains helper methods for checking if we should update channels and updating them if so.
- */
-public class ChannelsUpdater {
-    @VisibleForTesting
-    static final String CHANNELS_VERSION_KEY = "channels_version_key";
-
-    private final ChannelsInitializer mChannelsInitializer;
-    private final SharedPreferences mSharedPreferences;
-    private final boolean mIsAtLeastO;
-    private final int mChannelsVersion;
-
-    public static ChannelsUpdater getInstance() {
-        return LazyHolder.INSTANCE;
-    }
-
-    private static class LazyHolder {
-        // If pre-O, initialize with nulls as a small optimization to avoid getting AppContext etc
-        // when we won't need it. It's ok for these parameters to be null when mIsAtLeastO is false.
-        public static final ChannelsUpdater INSTANCE = !BuildInfo.isAtLeastO()
-                ? new ChannelsUpdater(false /* isAtLeastO */, null, null, -1)
-                : new ChannelsUpdater(true /* isAtLeastO */, ContextUtils.getAppSharedPreferences(),
-                          new ChannelsInitializer(
-                                  new NotificationManagerProxyImpl(
-                                          (NotificationManager) ContextUtils.getApplicationContext()
-                                                  .getSystemService(Context.NOTIFICATION_SERVICE)),
-                                  new ChannelDefinitions()),
-                          ChannelDefinitions.CHANNELS_VERSION);
-    }
-
-    @VisibleForTesting
-    ChannelsUpdater(boolean isAtLeastO, SharedPreferences sharedPreferences,
-            ChannelsInitializer channelsInitializer, int channelsVersion) {
-        mIsAtLeastO = isAtLeastO;
-        mSharedPreferences = sharedPreferences;
-        mChannelsInitializer = channelsInitializer;
-        mChannelsVersion = channelsVersion;
-    }
-
-    public boolean shouldUpdateChannels() {
-        return mIsAtLeastO
-                && mSharedPreferences.getInt(CHANNELS_VERSION_KEY, -1) != mChannelsVersion;
-    }
-
-    public void updateChannels() {
-        if (!mIsAtLeastO) return;
-        assert mChannelsInitializer != null;
-        mChannelsInitializer.deleteLegacyChannels();
-        mChannelsInitializer.initializeStartupChannels();
-        storeChannelVersionInPrefs();
-    }
-
-    private void storeChannelVersionInPrefs() {
-        assert mSharedPreferences != null;
-        mSharedPreferences.edit().putInt(CHANNELS_VERSION_KEY, mChannelsVersion).apply();
-    }
-}