Rename connection_id to server_connection_id

This is a step on the way to enabling client connection IDs. It will make the code less ambiguous once we introduce client_connection_id.

gfe-relnote: n/a, renaming code only
PiperOrigin-RevId: 249045070
Change-Id: Ia7ba75511f96c896bc6f0f4978dae2cd13e707fb
diff --git a/quic/test_tools/quic_framer_peer.cc b/quic/test_tools/quic_framer_peer.cc
index 23486ea..dcb0e94 100644
--- a/quic/test_tools/quic_framer_peer.cc
+++ b/quic/test_tools/quic_framer_peer.cc
@@ -22,10 +22,10 @@
 }
 
 // static
-void QuicFramerPeer::SetLastSerializedConnectionId(
+void QuicFramerPeer::SetLastSerializedServerConnectionId(
     QuicFramer* framer,
-    QuicConnectionId connection_id) {
-  framer->last_serialized_connection_id_ = connection_id;
+    QuicConnectionId server_connection_id) {
+  framer->last_serialized_server_connection_id_ = server_connection_id;
 }
 
 // static