Use associated interface on DownloadedTempFile

content/browser/loader/mojo_async_resource_handler.cc

Index: content/browser/loader/mojo_async_resource_handler.cc
diff --git a/content/browser/loader/mojo_async_resource_handler.cc b/content/browser/loader/mojo_async_resource_handler.cc
index 0d103654468e3923424646aa51031246b07daeef..8f65ed3bd566d77cb134a0d99cf25d20c0f4ddb0 100644
--- a/content/browser/loader/mojo_async_resource_handler.cc
+++ b/content/browser/loader/mojo_async_resource_handler.cc
@@ -171,10 +171,10 @@ bool MojoAsyncResourceHandler::OnResponseStarted(ResourceResponse* response,
   response->head.response_start = base::TimeTicks::Now();
   sent_received_response_message_ = true;
 
-  mojom::DownloadedTempFilePtr downloaded_file_ptr;
+  mojom::DownloadedTempFileAssociatedPtrInfo downloaded_file_ptr;
   if (!response->head.download_file_path.empty()) {

[mmenke, 2017/01/18 20:08:53]

Hrm....I assume we never do this for main frames (Or sub frames)?  We'll want to
be passing main frame URLLoaders from the renderer to the browser in response to
OnResponseStarted calls, which we can't do once we have associated interfaces, I
believe?

[tzik, 2017/01/19 13:04:41]

Do you mean TransferredNavigation case? Right, it's only for the navigation and
a request for the main resource, for which we don't use download-to-file mode.

[mmenke, 2017/01/19 13:09:08]

I mean cases in which we'd want to transfer the URLLoader around.  For
navigations (Both main frame, with PlzNavigate, and subframes, with
PlzNavigate+OOPIF), we'd want to drive the URLLoader from the navigation code,
and then pass it to the renderer (Or download subsystem, if we discover it's a
download)

-    downloaded_file_ptr = DownloadedTempFileImpl::Create(info->GetChildID(),
-                                                         info->GetRequestID());
+    downloaded_file_ptr = DownloadedTempFileImpl::Create(
+        binding_.associated_group(), info->GetChildID(), info->GetRequestID());
     rdh_->RegisterDownloadedTempFile(info->GetChildID(), info->GetRequestID(),
                                      response->head.download_file_path);
   }