Convert a QUIC LOG(WARNING) into a LOG(INFO), because a buggy client or a client with corrupted mem…

net/quic/quic_connection.cc

Index: net/quic/quic_connection.cc
diff --git a/net/quic/quic_connection.cc b/net/quic/quic_connection.cc
index e5bc5b16250a8000e10b0796f9f34a87cfef7401..f3a3f653c59f5744e0f97bc4f65a0367830b1009 100644
--- a/net/quic/quic_connection.cc
+++ b/net/quic/quic_connection.cc
@@ -846,13 +846,13 @@ const char* QuicConnection::ValidateAckFrame(const QuicAckFrame& incoming_ack) {
 
   if (incoming_ack.largest_observed <
       sent_packet_manager_->GetLargestObserved(incoming_ack.path_id)) {
-    LOG(WARNING) << ENDPOINT << "Peer's largest_observed packet decreased:"
-                 << incoming_ack.largest_observed << " vs "
-                 << sent_packet_manager_->GetLargestObserved(
-                        incoming_ack.path_id)
-                 << " packet_number:" << last_header_.packet_number
-                 << " largest seen with ack:" << largest_seen_packet_with_ack_
-                 << " connection_id: " << connection_id_;
+    VLOG(1) << ENDPOINT << "Peer's largest_observed packet decreased:"
+            << incoming_ack.largest_observed << " vs "
+            << sent_packet_manager_->GetLargestObserved(
+                incoming_ack.path_id)
+            << " packet_number:" << last_header_.packet_number
+            << " largest seen with ack:" << largest_seen_packet_with_ack_
+            << " connection_id: " << connection_id_;
     // A new ack has a diminished largest_observed value.  Error out.
     // If this was an old packet, we wouldn't even have checked.
     return "Largest observed too low.";