Android notifications: set group for push notifications

chrome/android/javatests/src/org/chromium/chrome/browser/notifications/CustomNotificationBuilderTest.java

 // Copyright 2015 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.annotation.TargetApi;
 import android.app.Notification;
 import android.app.PendingIntent;
 import android.content.Context;
@@ skipping 75 matching lines @@
         View compactView = notification.contentView.apply(context, new LinearLayout(context));
         View bigView = notification.bigContentView.apply(context, new LinearLayout(context));
 
         assertEquals("title", getIdenticalText(R.id.title, compactView, bigView));
         assertEquals("body", getIdenticalText(R.id.body, compactView, bigView));
         assertEquals("origin", getIdenticalText(R.id.origin, compactView, bigView));
 
         assertEquals("title", NotificationTestUtil.getExtraTitle(notification));
         assertEquals("body", NotificationTestUtil.getExtraText(notification));
         assertEquals("origin", NotificationTestUtil.getExtraSubText(notification));
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT_WATCH) {
+            assertEquals(
+                    NotificationConstants.GROUP_WEB_PREFIX + "origin", notification.getGroup());
+        }
 
         assertEquals("ticker", notification.tickerText.toString());
         assertEquals(Notification.DEFAULT_ALL, notification.defaults);
         assertEquals(1, notification.vibrate.length);
         assertEquals(100L, notification.vibrate[0]);
         assertSame(contentIntent, notification.contentIntent);
         assertSame(deleteIntent, notification.deleteIntent);
 
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
             // Notification.publicVersion was added in Android L.
@@ skipping 274 matching lines @@
         return PendingIntent.getBroadcast(
                 context, 0 /* requestCode */, intent, PendingIntent.FLAG_UPDATE_CURRENT);
     }
 
     private static String createString(char character, int length) {
         char[] chars = new char[length];
         Arrays.fill(chars, character);
         return new String(chars);
     }
 }