diff -r 000000000000 -r 6474c204b198 mobile/android/base/AlertNotification.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mobile/android/base/AlertNotification.java	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,125 @@
+/* -*- Mode: Java; c-basic-offset: 4; tab-width: 4; indent-tabs-mode: nil; -*-
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+package org.mozilla.gecko;
+
+import org.mozilla.gecko.gfx.BitmapUtils;
+
+import android.app.Notification;
+import android.app.NotificationManager;
+import android.content.Context;
+import android.graphics.Bitmap;
+import android.net.Uri;
+import android.util.Log;
+import android.widget.RemoteViews;
+
+import java.text.NumberFormat;
+
+public class AlertNotification
+    extends Notification
+{
+    private static final String LOGTAG = "GeckoAlertNotification";
+
+    private final int mId;
+    private final int mIcon;
+    private final String mTitle;
+    private final String mText;
+    private final NotificationManager mNotificationManager;
+
+    private boolean mProgressStyle;
+    private double mPrevPercent  = -1;
+    private String mPrevAlertText = "";
+
+    private static final double UPDATE_THRESHOLD = .01;
+    private Context mContext;
+
+    public AlertNotification(Context aContext, int aNotificationId, int aIcon,
+                             String aTitle, String aText, long aWhen, Uri aIconUri) {
+        super(aIcon, (aText.length() > 0) ? aText : aTitle, aWhen);
+
+        mIcon = aIcon;
+        mTitle = aTitle;
+        mText = aText;
+        mId = aNotificationId;
+        mContext = aContext;
+
+        mNotificationManager = (NotificationManager) aContext.getSystemService(Context.NOTIFICATION_SERVICE);
+
+        if (aIconUri == null || aIconUri.getScheme() == null)
+            return;
+
+        // Custom view
+        int layout = R.layout.notification_icon_text;
+        RemoteViews view = new RemoteViews(mContext.getPackageName(), layout);
+        try {
+            Bitmap bm = BitmapUtils.decodeUrl(aIconUri);
+            if (bm == null) {
+                Log.e(LOGTAG, "failed to decode icon");
+                return;
+            }
+            view.setImageViewBitmap(R.id.notification_image, bm);
+            view.setTextViewText(R.id.notification_title, mTitle);
+            if (mText.length() > 0) {
+                view.setTextViewText(R.id.notification_text, mText);
+            }
+            contentView = view;
+        } catch (Exception e) {
+            Log.e(LOGTAG, "failed to create bitmap", e);
+        }
+    }
+
+    public int getId() {
+        return mId;
+    }
+
+    public synchronized boolean isProgressStyle() {
+        return mProgressStyle;
+    }
+
+    public void show() {
+        mNotificationManager.notify(mId, this);
+    }
+
+    public void cancel() {
+        mNotificationManager.cancel(mId);
+    }
+
+    public synchronized void updateProgress(String aAlertText, long aProgress, long aProgressMax) {
+        if (!mProgressStyle) {
+            // Custom view
+            int layout =  aAlertText.length() > 0 ? R.layout.notification_progress_text : R.layout.notification_progress;
+
+            RemoteViews view = new RemoteViews(mContext.getPackageName(), layout);
+            view.setImageViewResource(R.id.notification_image, mIcon);
+            view.setTextViewText(R.id.notification_title, mTitle);
+            contentView = view;
+            flags |= FLAG_ONGOING_EVENT | FLAG_ONLY_ALERT_ONCE;
+
+            mProgressStyle = true;
+        }
+
+        String text;
+        double percent = 0;
+        if (aProgressMax > 0)
+            percent = ((double)aProgress / (double)aProgressMax);
+
+        if (aAlertText.length() > 0)
+            text = aAlertText;
+        else
+            text = NumberFormat.getPercentInstance().format(percent); 
+
+        if (mPrevAlertText.equals(text) && Math.abs(mPrevPercent - percent) < UPDATE_THRESHOLD)
+            return;
+
+        contentView.setTextViewText(R.id.notification_text, text);
+        contentView.setProgressBar(R.id.notification_progressbar, (int)aProgressMax, (int)aProgress, false);
+
+        // Update the notification
+        mNotificationManager.notify(mId, this);
+
+        mPrevPercent = percent;
+        mPrevAlertText = text;
+    }
+}