net: Return size of upload as well as position from HttpTransaction::GetUploadProgress()

net/http/http_network_transaction.cc

Index: net/http/http_network_transaction.cc
diff --git a/net/http/http_network_transaction.cc b/net/http/http_network_transaction.cc
index e825fb2e667e0c166deb32b07d883f6da9993344..844fc34bb5f5051f0033b3c0ffce5b51344715d6 100644
--- a/net/http/http_network_transaction.cc
+++ b/net/http/http_network_transaction.cc
@@ -374,9 +374,9 @@ LoadState HttpNetworkTransaction::GetLoadState() const {
   }
 }
 
-uint64 HttpNetworkTransaction::GetUploadProgress() const {
+UploadProgress HttpNetworkTransaction::GetUploadProgress() const {
   if (!stream_.get())
-    return 0;
+    return UploadProgress();
 
   return stream_->GetUploadProgress();
 }