[Offline pages] Download UI: Adding Download Service Delegate for notifications

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

Index: chrome/android/java/src/org/chromium/chrome/browser/download/DownloadServiceDelegate.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/download/DownloadServiceDelegate.java b/chrome/android/java/src/org/chromium/chrome/browser/download/DownloadServiceDelegate.java
new file mode 100644
index 0000000000000000000000000000000000000000..91584e757954bbe2d91584378d5ef46db4648446
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/download/DownloadServiceDelegate.java
@@ -0,0 +1,32 @@
+// Copyright 2016 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;
+
+/** Interface for classes implementing concrete implementation of UI behavior. */
+public interface DownloadServiceDelegate {
+    /**
+     * Called to cancel a download.
+     * @param downloadGuid GUID of the download.
+     * @param isOffTheRecord Whether the download is off the record.
+     * @param isNotificationDismissed Whether cancel is caused by dismissing the notification.
+     */
+    void cancelDownload(String downloadGuid, boolean isOffTheRecord,
+            boolean isNotificationDismissed);
+
+    /**
+     * Called to pause a download.
+     * @param downloadGuid GUID of the download.
+     * @param isOffTheRecord Whether the download is off the record.
+     */
+    void pauseDownload(String downloadGuid, boolean isOffTheRecord);
+
+    /**
+     * Called to resume a paused download.
+     * @param item Download item to resume.
+     * @param hasUserGesture Whether the resumption is triggered by user gesture.
+     * TODO(fgorski): Update the interface to not require download item.
+     */
+    void resumeDownload(DownloadItem item, boolean hasUserGesture);
+}