Group Downloads notifications, and separate Incognito

chrome/android/java/src/org/chromium/chrome/browser/incognito/IncognitoNotificationManager.java

Index: chrome/android/java/src/org/chromium/chrome/browser/incognito/IncognitoNotificationManager.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/incognito/IncognitoNotificationManager.java b/chrome/android/java/src/org/chromium/chrome/browser/incognito/IncognitoNotificationManager.java
index fb843214b700b0ec9c03a74ca7c737b215444a0c..a8e3557d1a7a452bd1436b1315d14210b4f034bd 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/incognito/IncognitoNotificationManager.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/incognito/IncognitoNotificationManager.java
@@ -11,6 +11,7 @@ import android.support.v4.app.NotificationCompat;
 
 import org.chromium.base.ContextUtils;
 import org.chromium.chrome.R;
+import org.chromium.chrome.browser.notifications.NotificationConstants;
 
 /**
  * Manages the notification indicating that there are incognito tabs opened in Document mode.
@@ -37,7 +38,8 @@ public class IncognitoNotificationManager {
                 .setVisibility(Notification.VISIBILITY_SECRET)
                 .setSmallIcon(R.drawable.incognito_statusbar)
                 .setShowWhen(false)
-                .setLocalOnly(true);
+                .setLocalOnly(true)
+                .setGroup(NotificationConstants.GROUP_INCOGNITO);
         NotificationManager nm =
                 (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
         nm.notify(INCOGNITO_TABS_OPEN_TAG, INCOGNITO_TABS_OPEN_ID, builder.build());