Upstream WebAPK notification related code

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

Index: chrome/android/java/src/org/chromium/chrome/browser/notifications/WebApkNotificationClient.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/notifications/WebApkNotificationClient.java b/chrome/android/java/src/org/chromium/chrome/browser/notifications/WebApkNotificationClient.java
new file mode 100644
index 0000000000000000000000000000000000000000..9f5e6497ffb514ee6c04a644674f82d5ce2ee674
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/notifications/WebApkNotificationClient.java
@@ -0,0 +1,67 @@
+// 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.notifications;
+
+import android.os.RemoteException;
+
+import org.chromium.base.Callback;
+import org.chromium.base.Log;
+import org.chromium.webapk.lib.client.WebApkServiceConnectionManager;
+import org.chromium.webapk.lib.runtime_library.IWebApkApi;
+
+/**
+ * WebApkNotificationClient provides an API to display and close notifications remotely in
+ * context of a WebAPK, enriching the notification with the WebAPK's small icon when available.
+ */
+public class WebApkNotificationClient {
+    private static final String TAG = "cr_WebApk";
+
+    // Callback which catches RemoteExceptions thrown due to IWebApkApi failure.
+    private abstract static class ApiUseCallback implements Callback<IWebApkApi> {
+        public abstract void useApi(IWebApkApi api) throws RemoteException;
+
+        @Override
+        public void onResult(IWebApkApi api) {
+            try {
+                useApi(api);
+            } catch (RemoteException e) {
+                Log.w(TAG, "WebApkAPI use failed.", e);
+            }
+        }
+    }
+
+    /**
+     * Connect to a WebAPK's bound service, build a notification and hand it over to the WebAPK to
+     * display. Handing over the notification makes the notification look like it originated from
+     * the WebAPK - not Chrome - in the Android UI.
+     */
+    public static void notifyNotification(String webApkPackage,
+            final NotificationBuilderBase notificationBuilder, final String platformTag,
+            final int platformID) {
+        final ApiUseCallback connectionCallback = new ApiUseCallback() {
+            @Override
+            public void useApi(IWebApkApi api) throws RemoteException {
+                notificationBuilder.setSmallIcon(api.getSmallIconId());
+                api.notifyNotification(platformTag, platformID, notificationBuilder.build());
+            }
+        };
+
+        WebApkServiceConnectionManager.getInstance().connect(webApkPackage, connectionCallback);
+    }
+
+    /**
+     * Cancel notification previously shown by WebAPK.
+     */
+    public static void cancelNotification(
+            String webApkPackage, final String platformTag, final int platformID) {
+        final ApiUseCallback connectionCallback = new ApiUseCallback() {
+            @Override
+            public void useApi(IWebApkApi api) throws RemoteException {
+                api.cancelNotification(platformTag, platformID);
+            }
+        };
+        WebApkServiceConnectionManager.getInstance().connect(webApkPackage, connectionCallback);
+    }
+}