Dispatch transfer size update notification on mojo-loading

content/child/resource_dispatcher.cc

Index: content/child/resource_dispatcher.cc
diff --git a/content/child/resource_dispatcher.cc b/content/child/resource_dispatcher.cc
index 89a604da2ca3f47c1bd89a4b333fad4a76b9e8d0..daec87e79e21536661ab2a7ce2f48014d6e15f25 100644
--- a/content/child/resource_dispatcher.cc
+++ b/content/child/resource_dispatcher.cc
@@ -114,6 +114,11 @@ class URLLoaderClientImpl final : public mojom::URLLoaderClient {
         ResourceMsg_DataDownloaded(request_id_, data_len, encoded_data_len));
   }
 
+  void OnTransferSizeUpdated(int64_t transfer_size_diff) override {
+    resource_dispatcher_->OnTransferSizeUpdated(request_id_,
+                                                transfer_size_diff);
+  }
+
   void OnStartLoadingResponseBody(
       mojo::ScopedDataPipeConsumerHandle body) override {
     DCHECK(!body_consumer_);
@@ -576,6 +581,16 @@ void ResourceDispatcher::DidChangePriority(int request_id,
       request_id, new_priority, intra_priority_value));
 }
 
+void ResourceDispatcher::OnTransferSizeUpdated(int request_id,
+                                               int transfer_size_diff) {
+  DCHECK_GT(transfer_size_diff, 0);
+  PendingRequestInfo* request_info = GetPendingRequestInfo(request_id);
+  if (!request_info)
+    return;
+
+  request_info->peer->OnTransferSizeUpdated(transfer_size_diff);
+}
+
 ResourceDispatcher::PendingRequestInfo::PendingRequestInfo(
     std::unique_ptr<RequestPeer> peer,
     ResourceType resource_type,