Makes WebAPK handle NOTIFICATION_PREFERENCES intents

chrome/android/webapk/shell_apk/src/org/chromium/webapk/shell_apk/NotificationSettingsLauncherActivity.java

Index: chrome/android/webapk/shell_apk/src/org/chromium/webapk/shell_apk/NotificationSettingsLauncherActivity.java
diff --git a/chrome/android/webapk/shell_apk/src/org/chromium/webapk/shell_apk/NotificationSettingsLauncherActivity.java b/chrome/android/webapk/shell_apk/src/org/chromium/webapk/shell_apk/NotificationSettingsLauncherActivity.java
new file mode 100644
index 0000000000000000000000000000000000000000..1eaa3b2a43218a377ec6dccac2694d6f61140f1c
--- /dev/null
+++ b/chrome/android/webapk/shell_apk/src/org/chromium/webapk/shell_apk/NotificationSettingsLauncherActivity.java
@@ -0,0 +1,45 @@
+// 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.shell_apk;
+
+import android.app.Activity;
+import android.content.ComponentName;
+import android.content.Intent;
+import android.os.Bundle;
+
+/**
+ * Forwards NOTIFICATION_PREFERENCES intent to host browser.
+ */
+public class NotificationSettingsLauncherActivity extends Activity {
+    private static final String META_HOST_BROWSER_NOTIFICATION_PREFERENCES_HANDLER =
+            "hostNotificationPreferencesHandler";
+
+    @Override
+    public void onCreate(Bundle savedInstance) {
+        super.onCreate(savedInstance);
+
+        String hostIntentHandlerClass = getHostBrowserPreferencesHandler();
+        if (hostIntentHandlerClass != null) {
+            String hostPackage = WebApkUtils.getHostBrowserPackageName(this);
+
+            Intent intent = getIntent();
+            intent.setPackage(hostPackage);
+            intent.setComponent(new ComponentName(hostPackage, hostIntentHandlerClass));
+            startActivity(intent);
+        }
+        finish();
+    }
+
+    /**
+     * Returns the class in the host browser's package which handles NOTIFICATION_PREFERENCES
+     * intents.
+     */
+    public String getHostBrowserPreferencesHandler() {
+        Bundle metaData = WebApkUtils.getMetaDataBundle(this);
+        return (metaData == null)
+                ? null
+                : metaData.getString(META_HOST_BROWSER_NOTIFICATION_PREFERENCES_HANDLER);
+    }
+}