[android] Add JobScheduler-based BackgroundTaskScheduler.

components/background_task_scheduler/android/java/src/org/chromium/components/background_task_scheduler/TaskIds.java

Index: components/background_task_scheduler/android/java/src/org/chromium/components/background_task_scheduler/TaskIds.java
diff --git a/components/background_task_scheduler/android/java/src/org/chromium/components/background_task_scheduler/TaskIds.java b/components/background_task_scheduler/android/java/src/org/chromium/components/background_task_scheduler/TaskIds.java
new file mode 100644
index 0000000000000000000000000000000000000000..8415fdc65eed8a4046942cf56cac2aa23361fee9
--- /dev/null
+++ b/components/background_task_scheduler/android/java/src/org/chromium/components/background_task_scheduler/TaskIds.java
@@ -0,0 +1,15 @@
+// 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.components.background_task_scheduler;
+
+/**
+ * This class lists all the unique task IDs used around in Chromium. These are listed here to ensure
+ * that there is no overlap of task IDs between different users of the BackgroundTaskScheduler.
+ */
+public final class TaskIds {
+    public static final int OMAHA_JOB_ID = 0x00011684;

[nyquist, 2017/02/22 18:24:12]

Self-review: Remove this ID or make a special ID for test instead.

[nyquist, 2017/02/24 23:41:12]

Done.

+
+    private TaskIds() {}
+}