Initial CL for Downloads resumption.

content/browser/download/download_resource_handler.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_BROWSER_DOWNLOAD_DOWNLOAD_RESOURCE_HANDLER_H_
 #define CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_RESOURCE_HANDLER_H_
 
 #include <string>
 
 #include "base/callback.h"
@@ skipping 19 matching lines @@
 struct DownloadCreateInfo;
 
 // Forwards data to the download thread.
 class DownloadResourceHandler
     : public ResourceHandler,
       public base::SupportsWeakPtr<DownloadResourceHandler> {
  public:
   typedef DownloadUrlParameters::OnStartedCallback OnStartedCallback;
 
   // started_cb will be called exactly once on the UI thread.
+  // |id| should be invalid if the id should be automatically assigned.
   DownloadResourceHandler(
+      DownloadId id,
       net::URLRequest* request,
       const OnStartedCallback& started_cb,
       scoped_ptr<DownloadSaveInfo> save_info);
 
   virtual bool OnUploadProgress(int request_id,
                                 uint64 position,
                                 uint64 size) OVERRIDE;
 
   // Not needed, as this event handler ought to be the final resource.
   virtual bool OnRequestRedirected(int request_id,
@@ skipping 42 matching lines @@
   // on the IO thread.
   void CallStartedCB(DownloadItem* item, net::Error error);
 
   // If the content-length header is not present (or contains something other
   // than numbers), the incoming content_length is -1 (unknown size).
   // Set the content length to 0 to indicate unknown size to DownloadManager.
   void SetContentLength(const int64& content_length);
 
   void SetContentDisposition(const std::string& content_disposition);
 
+  DownloadId download_id_;
   GlobalRequestID global_id_;
   int render_view_id_;
   std::string content_disposition_;
   int64 content_length_;
   net::URLRequest* request_;
   // This is read only on the IO thread, but may only
   // be called on the UI thread.
   OnStartedCallback started_cb_;
   scoped_ptr<DownloadSaveInfo> save_info_;
 
@@ skipping 18 matching lines @@
 
   static const int kReadBufSize = 32768;  // bytes
   static const int kThrottleTimeMs = 200;  // milliseconds
 
   DISALLOW_COPY_AND_ASSIGN(DownloadResourceHandler);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_RESOURCE_HANDLER_H_