relnote: Deprecate FLAGS_exact_stream_id_delta, which has always

net/quic/quic_session.cc

Index: net/quic/quic_session.cc
diff --git a/net/quic/quic_session.cc b/net/quic/quic_session.cc
index 8e3696ba07d6648f3fbbc94d8e5ccb2892576c8d..0d60ae9e106238f924c937d4362838ec8cee5056 100644
--- a/net/quic/quic_session.cc
+++ b/net/quic/quic_session.cc
@@ -604,40 +604,22 @@ ReliableQuicStream* QuicSession::GetIncomingDynamicStream(
   }
   implicitly_created_streams_.erase(stream_id);
   if (stream_id > largest_peer_created_stream_id_) {
-    if (FLAGS_exact_stream_id_delta) {
-      // Check if the number of streams that will be created (including
-      // implicitly open streams) would cause the number of open streams to
-      // exceed the limit.  Note that the peer can create only
-      // alternately-numbered streams.
-      if ((stream_id - largest_peer_created_stream_id_) / 2 +
-              GetNumOpenStreams() >
-          get_max_open_streams()) {
-        DVLOG(1) << "Failed to create a new incoming stream with id:"
-                 << stream_id << ".  Already " << GetNumOpenStreams()
-                 << " streams open, would exceed max " << get_max_open_streams()
-                 << ".";
-        // We may already have sent a connection close due to multiple reset
-        // streams in the same packet.
-        if (connection()->connected()) {
-          connection()->SendConnectionClose(QUIC_TOO_MANY_OPEN_STREAMS);
-        }
-        return nullptr;
-      }
-    } else {
-      // Limit on the delta between stream IDs.
-      const QuicStreamId kMaxStreamIdDelta = 200;
-      if (stream_id - largest_peer_created_stream_id_ > kMaxStreamIdDelta) {
-        // We may already have sent a connection close due to multiple reset
-        // streams in the same packet.
-        if (connection()->connected()) {
-          LOG(ERROR) << "Trying to get stream: " << stream_id
-                     << ", largest peer created stream: "
-                     << largest_peer_created_stream_id_
-                     << ", max delta: " << kMaxStreamIdDelta;
-          connection()->SendConnectionClose(QUIC_INVALID_STREAM_ID);
-        }
-        return nullptr;
+    // Check if the number of streams that will be created (including implicitly
+    // open streams) would cause the number of open streams to exceed the limit.
+    // Note that the peer can create only alternately-numbered streams.
+    if ((stream_id - largest_peer_created_stream_id_) / 2 +
+            GetNumOpenStreams() >
+        get_max_open_streams()) {
+      DVLOG(1) << "Failed to create a new incoming stream with id:" << stream_id
+               << ".  Already " << GetNumOpenStreams()
+               << " streams open, would exceed max " << get_max_open_streams()
+               << ".";
+      // We may already have sent a connection close due to multiple reset
+      // streams in the same packet.
+      if (connection()->connected()) {
+        connection()->SendConnectionClose(QUIC_TOO_MANY_OPEN_STREAMS);
       }
+      return nullptr;
     }
     for (QuicStreamId id = largest_peer_created_stream_id_ + 2;
          id < stream_id;