Upstream WebAPK notification related code

chrome/android/webapk/libs/runtime_library/src/org/chromium/webapk/lib/runtime_library/WebApkServiceImpl.java

Index: chrome/android/webapk/libs/runtime_library/src/org/chromium/webapk/lib/runtime_library/WebApkServiceImpl.java
diff --git a/chrome/android/webapk/libs/runtime_library/src/org/chromium/webapk/lib/runtime_library/WebApkServiceImpl.java b/chrome/android/webapk/libs/runtime_library/src/org/chromium/webapk/lib/runtime_library/WebApkServiceImpl.java
new file mode 100644
index 0000000000000000000000000000000000000000..793b8aa0fbd2c8221ac3e331d861e6fd50343b4c
--- /dev/null
+++ b/chrome/android/webapk/libs/runtime_library/src/org/chromium/webapk/lib/runtime_library/WebApkServiceImpl.java
@@ -0,0 +1,53 @@
+// 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.webapk.lib.runtime_library;
+
+import android.app.Notification;
+import android.app.NotificationManager;
+import android.content.Context;
+
+/**
+ * Implements services offered by the WebAPK to Chrome.
+ */
+public class WebApkServiceImpl extends IWebApkApi.Stub {
+
+    private static final String TAG = "WebApkServiceImpl";
+
+    private final Context mContext;
+
+    /**
+     * Id of icon to represent WebAPK notifications in status bar.
+     */
+    private final int mSmallIconId;
+
+    /**
+     * Creates an instance of WebApkServiceImpl.
+     * @param context
+     * @param smallIconId Id of icon to represent notifications in status bar.
+     */
+    public WebApkServiceImpl(Context context, int smallIconId) {
+        mContext = context;
+        mSmallIconId = smallIconId;
+    }
+
+    @Override
+    public int getSmallIconId() {
+        return mSmallIconId;
+    }
+
+    @Override
+    public void notifyNotification(String platformTag, int platformID, Notification notification) {
+        getNotificationManager().notify(platformTag, platformID, notification);
+    }
+
+    @Override
+    public void cancelNotification(String platformTag, int platformID) {
+        getNotificationManager().cancel(platformTag, platformID);
+    }
+
+    private NotificationManager getNotificationManager() {
+        return (NotificationManager) mContext.getSystemService(Context.NOTIFICATION_SERVICE);
+    }
+}