Preliminary work on resuming downloads whose connections have expired.

chrome/browser/renderer_host/resource_dispatcher_host_request_info.h

Index: chrome/browser/renderer_host/resource_dispatcher_host_request_info.h
diff --git a/chrome/browser/renderer_host/resource_dispatcher_host_request_info.h b/chrome/browser/renderer_host/resource_dispatcher_host_request_info.h
index f5b7535aaf865d40f086731825f73da640d10373..78e3a556ba47815f3cf113be44df186d6c0c988e 100644
--- a/chrome/browser/renderer_host/resource_dispatcher_host_request_info.h
+++ b/chrome/browser/renderer_host/resource_dispatcher_host_request_info.h
@@ -160,6 +160,15 @@ class ResourceDispatcherHostRequestInfo : public URLRequest::UserData {
   int host_renderer_id() const { return host_renderer_id_; }
   int host_render_view_id() const { return host_render_view_id_; }
 
+  // Request had a network error, and a new request must be issued. Should be
+  // used only by DownloadResourceHandler::OnResponseStarted().
+  bool was_interrupted() const { return was_interrupted_; }
+  void set_was_interrupted(bool interrupted) { was_interrupted_ = interrupted; }
+
+  // How many bytes were read before this request was interrupted.
+  int64 interrupted_bytes() const { return interrupted_bytes_; }
+  void set_interrupted_bytes(int64 bytes) { interrupted_bytes_ = bytes; }
+
  private:
   friend class ResourceDispatcherHost;
 
@@ -221,6 +230,8 @@ class ResourceDispatcherHostRequestInfo : public URLRequest::UserData {
   bool called_on_response_started_;
   bool has_started_reading_;
   int paused_read_bytes_;
+  bool was_interrupted_;
+  int64 interrupted_bytes_;
 
   // The following two members are specified if the request is initiated by
   // a plugin like Gears.