[Android O] Initialize notification channels on OS upgrade

chrome/android/java/src/org/chromium/chrome/browser/upgrade/BootCompletedBroadcastReceiver.java

+// Copyright 2016 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.upgrade;
+
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+
+import org.chromium.chrome.browser.notifications.ChannelsUpdater;
+
+/**
+ * A broadcast receiver for scheduling tasks that should run on device startup.
+ * See {@link Intent#ACTION_BOOT_COMPLETED}.
+ *
+ * This can also be used for tasks that should happen on OS upgrade (since there is no "OS_UPGRADED"
+ * broadcast, the recommendation is to listen for this one and check whether the OS upgraded).
+ *
+ * Currently it is just used to initialize notification channels on upgrade to O.
+ */
+public final class BootCompletedBroadcastReceiver extends BroadcastReceiver {
+    @Override
+    public void onReceive(final Context context, Intent intent) {
+        if (!Intent.ACTION_BOOT_COMPLETED.equals(intent.getAction())) return;
+        updateChannelsIfNecessary();
+    }
+
+    private void updateChannelsIfNecessary() {
+        if (!ChannelsUpdater.getInstance().shouldUpdateChannels()) return;
+        ChannelsUpdater.getInstance().updateChannelsInBackground(goAsync());
+    }
+}