Introduce Queue-Based Notification Snackbars

chrome/android/java/src/org/chromium/chrome/browser/download/DownloadSnackbarController.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.download;
 
 import android.app.Activity;
 import android.content.Context;
 import android.util.Pair;
 
@@ skipping 34 matching lines @@
     /**
      * Called to display the download succeeded snackbar.
      *
      * @param downloadInfo Info of the download.
      * @param downloadId Id of the download.
      * @param canBeResolved Whether the download can be resolved to any activity.
      */
     public void onDownloadSucceeded(
             DownloadInfo downloadInfo, final long downloadId, boolean canBeResolved) {
         if (getSnackbarManager() == null) return;
-        Snackbar snackbar = Snackbar.make(mContext.getString(
-                R.string.download_succeeded_message, downloadInfo.getFileName()), this);
+        Snackbar snackbar = Snackbar.make(
+                mContext.getString(R.string.download_succeeded_message, downloadInfo.getFileName()),
+                this, Snackbar.TYPE_NOTIFICATION);
         // TODO(qinmin): Coalesce snackbars if multiple downloads finish at the same time.
         snackbar.setDuration(SNACKBAR_DURATION_IN_MILLISECONDS).setSingleLine(false);
         Pair<DownloadInfo, Long> actionData = null;
         if (canBeResolved) {
             actionData = Pair.create(downloadInfo, downloadId);
         }
         // Show downloads app if the download cannot be resolved to any activity.
         snackbar.setAction(
                 mContext.getString(R.string.open_downloaded_label), actionData);
         getSnackbarManager().showSnackbar(snackbar);
     }
 
     /**
      * Called to display the download failed snackbar.
      *
      * @param filename File name of the failed download.
      * @param whether to show all downloads in case the failure is caused by duplicated files.
      */
     public void onDownloadFailed(String errorMessage, boolean showAllDownloads) {
         if (getSnackbarManager() == null) return;
         // TODO(qinmin): Coalesce snackbars if multiple downloads finish at the same time.
-        Snackbar snackbar = Snackbar.make(errorMessage, this)
+        Snackbar snackbar = Snackbar.make(errorMessage, this, Snackbar.TYPE_NOTIFICATION)
                 .setSingleLine(false)
                 .setDuration(SNACKBAR_DURATION_IN_MILLISECONDS);
         if (showAllDownloads) {
             snackbar.setAction(
                     mContext.getString(R.string.open_downloaded_label),
                     null);
         }
         getSnackbarManager().showSnackbar(snackbar);
     }
 
     public SnackbarManager getSnackbarManager() {
         Activity activity = ApplicationStatus.getLastTrackedFocusedActivity();
         if (activity != null && ApplicationStatus.hasVisibleActivities()
                 && activity instanceof SnackbarManager.SnackbarManageable) {
             return ((SnackbarManager.SnackbarManageable) activity).getSnackbarManager();
         }
         return null;
     }
 }