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

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

Index: chrome/android/java/src/org/chromium/chrome/browser/notifications/ChannelsInitializer.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/notifications/ChannelsInitializer.java b/chrome/android/java/src/org/chromium/chrome/browser/notifications/ChannelsInitializer.java
deleted file mode 100644
index 299189c10f587f325c27e454bfc3e3f383e39c92..0000000000000000000000000000000000000000
--- a/chrome/android/java/src/org/chromium/chrome/browser/notifications/ChannelsInitializer.java
+++ /dev/null
@@ -1,61 +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;
-
-/**
- * Initializes our notification channels.
- */
-public class ChannelsInitializer {
-
-    private final NotificationManagerProxy mNotificationManager;
-    private final ChannelDefinitions mChannelDefinitions;
-
-    public ChannelsInitializer(NotificationManagerProxy notificationManagerProxy,
-            ChannelDefinitions channelDefinitions) {
-        mNotificationManager = notificationManagerProxy;
-        mChannelDefinitions = channelDefinitions;
-    }
-
-    /**
-     * Creates all the channels on the notification manager that we want to appear in our
-     * channel settings from first launch onwards.
-     */
-    public void initializeStartupChannels() {
-        for (String channelId : mChannelDefinitions.getStartupChannelIds()) {
-            ensureInitialized(channelId);
-        }
-    }
-
-    /**
-     * Cleans up any old channels that are no longer required from previous versions of the app.
-     * It's safe to call this multiple times since deleting an already-deleted channel is a no-op.
-     */
-    void deleteLegacyChannels() {
-        for (String channelId : mChannelDefinitions.getLegacyChannelIds()) {
-            mNotificationManager.deleteNotificationChannel(channelId);
-        }
-    }
-
-    /**
-     * Ensures the given channel has been created on the notification manager so a notification
-     * can be safely posted to it. This should only be used for channels that are predefined in
-     * {@link ChannelDefinitions.PredefinedChannels}.
-     *
-     * Calling this is a (potentially lengthy) no-op if the channel has already been created.
-     *
-     * @param channelId The ID of the channel to be initialized.
-     */
-    public void ensureInitialized(@ChannelDefinitions.ChannelId String channelId) {
-        ChannelDefinitions.Channel channel = mChannelDefinitions.getChannelFromId(channelId);
-        if (channel == null) {
-            throw new IllegalStateException("Could not initialize channel: " + channelId);
-        }
-        // Channel group must be created before the channel.
-        mNotificationManager.createNotificationChannelGroup(
-                mChannelDefinitions.getChannelGroupFromId(channel));
-        mNotificationManager.createNotificationChannel(channel);
-    }
-
-}