Add DownloadControllerAndroid public interface for android.

content/public/browser/android/download_controller_android.h

+// Copyright (c) 2012 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.
+
+#ifndef CONTENT_PUBLIC_BROWSER_ANDROID_DOWNLOAD_CONTROLLER_ANDROID_H_
+#define CONTENT_PUBLIC_BROWSER_ANDROID_DOWNLOAD_CONTROLLER_ANDROID_H_
+
+namespace content {
+class DownloadItem;
+class RenderViewHost;
+class WebContents;
+
+// Interface to request GET downloads and send notifications for POST
+// downloads.
+class DownloadControllerAndroid {
+ public:
+  // Returns the singleton instance of the DownloadControllerAndroid.
+  static DownloadControllerAndroid* Get();
+
+  // Starts a new download request with Android. Should be called on the
+  // UI thread.
+  virtual void CreateGETDownload(RenderViewHost* source, int request_id) = 0;
+
+  // Should be called when a POST download is started. Notifies the embedding
+  // app about the download. Should be called on the UI thread.
+  virtual void OnPostDownloadStarted(WebContents* web_contents,
+                                     DownloadItem* download_item) = 0;
+ protected:
+  virtual ~DownloadControllerAndroid() {};
+};
+
+}  // namespace content
+
+#endif  // CONTENT_PUBLIC_BROWSER_ANDROID_DOWNLOAD_CONTROLLER_ANDROID_H_