Properly clean up notification on download open

chrome/android/java/src/org/chromium/chrome/browser/download/DownloadSnackbarController.java

Index: chrome/android/java/src/org/chromium/chrome/browser/download/DownloadSnackbarController.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/download/DownloadSnackbarController.java b/chrome/android/java/src/org/chromium/chrome/browser/download/DownloadSnackbarController.java
index 401c1dbe7c4ae6e0f85ff5f4d64cba0db8e26f6b..93629e0812b84f2cbfc208f920f334de255faafd 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/download/DownloadSnackbarController.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/download/DownloadSnackbarController.java
@@ -5,7 +5,6 @@
 package org.chromium.chrome.browser.download;
 
 import android.app.Activity;
-import android.app.NotificationManager;
 import android.content.Context;
 
 import org.chromium.base.ApplicationStatus;
@@ -54,10 +53,8 @@ public class DownloadSnackbarController implements SnackbarManager.SnackbarContr
         DownloadManagerService manager = DownloadManagerService.getDownloadManagerService(mContext);
         manager.openDownloadedContent(download.downloadInfo, download.systemDownloadId);
         if (download.notificationId != INVALID_NOTIFICATION_ID) {
-            NotificationManager notificationManager =
-                    (NotificationManager) mContext.getSystemService(Context.NOTIFICATION_SERVICE);
-            notificationManager.cancel(
-                    DownloadNotificationService.NOTIFICATION_NAMESPACE, download.notificationId);
+            manager.getDownloadNotifier().removeDownloadNotification(
+                    download.notificationId, download.downloadInfo);
         }
     }