Implement privacy disclosure for an unbound webapk.

chrome/android/java/src/org/chromium/chrome/browser/webapps/WebApkDisclosureNotificationManager.java

Index: chrome/android/java/src/org/chromium/chrome/browser/webapps/WebApkDisclosureNotificationManager.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/webapps/WebApkDisclosureNotificationManager.java b/chrome/android/java/src/org/chromium/chrome/browser/webapps/WebApkDisclosureNotificationManager.java
new file mode 100644
index 0000000000000000000000000000000000000000..ea3f556638fabe622aa957072841d22150b38227
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/webapps/WebApkDisclosureNotificationManager.java
@@ -0,0 +1,67 @@
+// 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.webapps;
+
+import android.app.Notification;
+import android.content.Context;
+import android.graphics.BitmapFactory;
+
+import org.chromium.base.ContextUtils;
+import org.chromium.chrome.R;
+import org.chromium.chrome.browser.notifications.NotificationUmaTracker;
+import org.chromium.chrome.browser.notifications.StandardNotificationBuilder;
+import org.chromium.chrome.browser.notifications.WebApkNotificationClient;
+import org.chromium.chrome.browser.notifications.channels.ChannelDefinitions;
+
+/**
+ * Manages the notification indicating that a WebApk is backed by chrome code and may share data.
+ * It's shown while an Unbound WebApk is displayed in the foreground until the user dismisses it.
+ */
+public class WebApkDisclosureNotificationManager {
+    // We always use the same integer id when showing and closing notifications. The notification
+    // tag is always set, which is a safe and sufficient way of identifying a notification, so the
+    // integer id is not needed anymore except it must not vary in an uncontrolled way.
+    private static final int PLATFORM_ID = 100;
+
+    // Prefix used for generating a unique notification tag.
+    private static final String DISMISSAL_NOTIFICATION_TAG_PREFIX =
+            "dismissal_notification_tag_prefix.";
+    /**
+     * Shows the privacy disclosure informing the user that Chrome is being used.
+     * @param webappInfo Web App this is currently displayed fullscreen.
+     */
+    public static void showDisclosure(WebappInfo webappInfo) {
+        Context context = ContextUtils.getApplicationContext();
+        String title = webappInfo.shortName();
+
+        StandardNotificationBuilder builder =
+                new StandardNotificationBuilder(context, ChannelDefinitions.CHANNEL_ID_BROWSER);
+        builder.setTitle(title)
+                .setPriority(Notification.PRIORITY_MIN)
+                .setLargeIcon(BitmapFactory.decodeResource(
+                        context.getResources(), R.drawable.ic_launcher))
+                .setDeleteIntent(WebApkDisclosureNotificationService.getDeleteIntent(
+                        context, webappInfo.id()))
+                .setBody(context.getResources().getString(
+                        R.string.webapk_running_in_chrome_disclosure, title));
+
+        WebApkNotificationClient.notifyNotification(webappInfo.webApkPackageName(), builder,
+                DISMISSAL_NOTIFICATION_TAG_PREFIX + webappInfo.webApkPackageName(), PLATFORM_ID);
+        // Even though the Notification is shown via the WebApk, we still want to record UMA.
+        NotificationUmaTracker.getInstance().onNotificationShown(
+                NotificationUmaTracker.WEBAPK, ChannelDefinitions.CHANNEL_ID_BROWSER);
+    }
+
+    /**
+     * Dismisses the notification.
+     * @param webappInfo Web App this is currently displayed fullscreen.
+     */
+    public static void dismissNotification(WebappInfo webappInfo) {
+        WebApkNotificationClient.cancelNotification(
+                webappInfo.webApkPackageName(),
+                DISMISSAL_NOTIFICATION_TAG_PREFIX + webappInfo.webApkPackageName(),
+                PLATFORM_ID);
+    }
+}