Move the core download files to content.

chrome/browser/download/download_request_handle.h

-// Copyright (c) 2011 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 CHROME_BROWSER_DOWNLOAD_DOWNLOAD_REQUEST_HANDLE_H_
-#define CHROME_BROWSER_DOWNLOAD_DOWNLOAD_REQUEST_HANDLE_H_
-#pragma once
-
-#include <string>
-
-class DownloadManager;
-class ResourceDispatcherHost;
-class TabContents;
-
-// A handle used by the download system for operations on the URLRequest
-// or objects conditional on it (e.g. TabContents).
-// This class needs to be copyable, so we can pass it across threads and not
-// worry about lifetime or const-ness.
-class DownloadRequestHandle {
- public:
-  // Create a null DownloadRequestHandle: getters will return null, and
-  // all actions are no-ops.
-  // TODO(rdsmith): Ideally, actions would be forbidden rather than
-  // no-ops, to confirm that no non-testing code actually uses
-  // a null DownloadRequestHandle.  But for now, we need the no-op
-  // behavior for unit tests.  Long-term, this should be fixed by
-  // allowing mocking of ResourceDispatcherHost in unit tests.
-  DownloadRequestHandle();
-
-  // Note that |rdh| is required to be non-null.
-  DownloadRequestHandle(ResourceDispatcherHost* rdh,
-                        int child_id,
-                        int render_view_id,
-                        int request_id);
-
-  // These functions must be called on the UI thread.
-  TabContents* GetTabContents() const;
-  DownloadManager* GetDownloadManager() const;
-
-  // Pause or resume the matching URL request.
-  void PauseRequest() const;
-  void ResumeRequest() const;
-
-  // Cancel the request
-  void CancelRequest() const;
-
-  std::string DebugString() const;
-
- private:
-  // The resource dispatcher host.
-  ResourceDispatcherHost* rdh_;
-
-  // The ID of the child process that started the download.
-  int child_id_;
-
-  // The ID of the render view that started the download.
-  int render_view_id_;
-
-  // The ID associated with the request used for the download.
-  int request_id_;
-};
-
-#endif  // CHROME_BROWSER_DOWNLOAD_DOWNLOAD_REQUEST_HANDLE_H_