Flesh out URLLoader's download_to_file function....

chrome/browser/renderer_host/resource_dispatcher_host_request_info.h

Index: chrome/browser/renderer_host/resource_dispatcher_host_request_info.h
===================================================================
--- chrome/browser/renderer_host/resource_dispatcher_host_request_info.h	(revision 60837)
+++ chrome/browser/renderer_host/resource_dispatcher_host_request_info.h	(working copy)
@@ -21,6 +21,10 @@
 class ResourceHandler;
 class SSLClientAuthHandler;
 
+namespace webkit_blob {
+class BlobData;
+}
+
 // Holds the data ResourceDispatcherHost associates with each request.
 // Retrieve this data by calling ResourceDispatcherHost::InfoForRequest.
 class ResourceDispatcherHostRequestInfo : public URLRequest::UserData {
@@ -160,6 +164,13 @@
   int host_renderer_id() const { return host_renderer_id_; }
   int host_render_view_id() const { return host_render_view_id_; }
 
+  // We hold a reference to the requested blob data to ensure it doesn't
+  // get finally released prior to the URLRequestJob being started.
+  webkit_blob::BlobData* requested_blob_data() const {
+    return requested_blob_data_.get();
+  }
+  void set_requested_blob_data(webkit_blob::BlobData* data);
+
  private:
   friend class ResourceDispatcherHost;
 
@@ -214,6 +225,7 @@
   base::TimeTicks last_upload_ticks_;
   bool waiting_for_upload_progress_ack_;
   int memory_cost_;
+  scoped_refptr<webkit_blob::BlobData> requested_blob_data_;
 
   // "Private" data accessible only to ResourceDispatcherHost (use the
   // accessors above for consistency).