Add DownloadControllerAndroid public interface for android.

content/browser/android/download_controller.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.
-
-// This class pairs with DownloadController on Java side to forward requests
-// for GET downloads to the current DownloadListener. POST downloads are
-// handled on the native side.
-//
-// Both classes are Singleton classes. C++ object owns Java object.
-//
-// Call sequence
-// GET downloads:
-// DownloadController::NewGetDownload() =>
-// DownloadController.newHttpGetDownload() =>
-// DownloadListener.onDownloadStart() /
-// DownloadListener2.requestHttpGetDownload()
-//
-
-#ifndef CONTENT_BROWSER_ANDROID_DOWNLOAD_CONTROLLER_H_
-#define CONTENT_BROWSER_ANDROID_DOWNLOAD_CONTROLLER_H_
-
-#include <string>
-
-#include "base/android/jni_helper.h"
-#include "base/android/scoped_java_ref.h"
-#include "base/memory/singleton.h"
-#include "content/public/browser/download_item.h"
-#include "googleurl/src/gurl.h"
-#include "net/cookies/cookie_monster.h"
-
-namespace net {
-class URLRequest;
-}
-
-namespace content {
-struct GlobalRequestID;
-class RenderViewHost;
-class WebContents;
-
-class DownloadController : public DownloadItem::Observer {
- public:
-  static bool RegisterDownloadController(JNIEnv* env);
-  static DownloadController* GetInstance();
-
-  // Called when DownloadController Java object is instantiated.
-  void Init(JNIEnv* env, jobject obj);
-
-  // Starts a new download request with Android. Should be called on the
-  // UI thread.
-  void CreateGETDownload(RenderViewHost* source,
-                         int request_id);
-
-  // Should be called when a POST download is started. Notifies the embedding
-  // app about the download. Called on the UI thread.
-  void OnPostDownloadStarted(WebContents* web_contents,
-                             DownloadItem* download_item);
-
-  // DownloadItem::Observer interface.
-  virtual void OnDownloadUpdated(DownloadItem* item) OVERRIDE;
-  virtual void OnDownloadOpened(DownloadItem* item) OVERRIDE;
-
- private:
-  // Used to store all the information about an Android download.
-  struct DownloadInfoAndroid {
-    explicit DownloadInfoAndroid(net::URLRequest* request);
-    ~DownloadInfoAndroid();
-
-    // The URL from which we are downloading. This is the final URL after any
-    // redirection by the server for |original_url_|.
-    GURL url;
-    // The original URL before any redirection by the server for this URL.
-    GURL original_url;
-    int64 total_bytes;
-    std::string content_disposition;
-    std::string original_mime_type;
-    std::string user_agent;
-    std::string cookie;
-    std::string referer;
-
-    WebContents* web_contents;
-    // Default copy constructor is used for passing this struct by value.
-  };
-
-  struct JavaObject;
-  friend struct DefaultSingletonTraits<DownloadController>;
-  DownloadController();
-  virtual ~DownloadController();
-
-  void PrepareDownloadInfo(const GlobalRequestID& global_id,
-                           int render_process_id,
-                           int render_view_id);
-
-  void CheckPolicyAndLoadCookies(const DownloadInfoAndroid& info,
-                                 int render_process_id,
-                                 int render_view_id,
-                                 const GlobalRequestID& global_id,
-                                 const net::CookieList& cookie_list);
-
-  void DoLoadCookies(const DownloadInfoAndroid& info,
-                     int render_process_id,
-                     int render_view_id,
-                     const GlobalRequestID& global_id);
-
-  void OnCookieResponse(DownloadInfoAndroid info,
-                        int render_process_id,
-                        int render_view_id,
-                        const std::string& cookie);
-
-  void StartAndroidDownload(const DownloadInfoAndroid& info,
-                            int render_process_id,
-                            int render_view_id);
-
-  base::android::ScopedJavaLocalRef<jobject> GetContentViewCoreFromWebContents(
-      WebContents* web_contents);
-
-  base::android::ScopedJavaLocalRef<jobject> GetContentView(
-      int render_process_id, int render_view_id);
-
-  // Creates Java object if it is not created already and returns it.
-  JavaObject* GetJavaObject();
-
-  JavaObject* java_object_;
-
-  DISALLOW_COPY_AND_ASSIGN(DownloadController);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_BROWSER_ANDROID_DOWNLOAD_CONTROLLER_H_