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/core/quic_packet_generator_test.cc b/quic/core/quic_packet_generator_test.cc
index 676d6e7..e1899ff 100644
--- a/quic/core/quic_packet_generator_test.cc
+++ b/quic/core/quic_packet_generator_test.cc
@@ -1139,12 +1139,12 @@
 
 TEST_F(QuicPacketGeneratorTest, TestConnectionIdLength) {
   QuicFramerPeer::SetPerspective(&framer_, Perspective::IS_SERVER);
-  generator_.SetConnectionIdLength(0);
+  generator_.SetServerConnectionIdLength(0);
   EXPECT_EQ(PACKET_0BYTE_CONNECTION_ID,
             creator_->GetDestinationConnectionIdLength());
 
   for (size_t i = 1; i < 10; i++) {
-    generator_.SetConnectionIdLength(i);
+    generator_.SetServerConnectionIdLength(i);
     if (framer_.transport_version() > QUIC_VERSION_43) {
       EXPECT_EQ(PACKET_0BYTE_CONNECTION_ID,
                 creator_->GetDestinationConnectionIdLength());