Move InternetChecksum from quic/qbone/ to quic/core/

Need to generate some packets and checksums in some non-QBONE-specific tests.

PiperOrigin-RevId: 589913844

build/source_list.json

diff --git a/build/source_list.json b/build/source_list.json
index baee204..4b1ae54 100644
--- a/build/source_list.json
+++ b/build/source_list.json
@@ -236,6 +236,7 @@
     "quiche/quic/core/http/spdy_utils.h",
     "quiche/quic/core/http/web_transport_http3.h",
     "quiche/quic/core/http/web_transport_stream_adapter.h",
+    "quiche/quic/core/internet_checksum.h",
     "quiche/quic/core/legacy_quic_stream_id_manager.h",
     "quiche/quic/core/packet_number_indexed_queue.h",
     "quiche/quic/core/proto/cached_network_parameters_proto.h",
@@ -576,6 +577,7 @@
     "quiche/quic/core/http/spdy_utils.cc",
     "quiche/quic/core/http/web_transport_http3.cc",
     "quiche/quic/core/http/web_transport_stream_adapter.cc",
+    "quiche/quic/core/internet_checksum.cc",
     "quiche/quic/core/legacy_quic_stream_id_manager.cc",
     "quiche/quic/core/qpack/qpack_blocking_manager.cc",
     "quiche/quic/core/qpack/qpack_decoded_headers_accumulator.cc",
@@ -1202,6 +1204,7 @@
     "quiche/quic/core/http/quic_spdy_stream_test.cc",
     "quiche/quic/core/http/spdy_utils_test.cc",
     "quiche/quic/core/http/web_transport_http3_test.cc",
+    "quiche/quic/core/internet_checksum_test.cc",
     "quiche/quic/core/legacy_quic_stream_id_manager_test.cc",
     "quiche/quic/core/packet_number_indexed_queue_test.cc",
     "quiche/quic/core/qpack/qpack_blocking_manager_test.cc",
@@ -1547,7 +1550,6 @@
     "quiche/quic/qbone/mock_qbone_client.h",
     "quiche/quic/qbone/mock_qbone_server_session.h",
     "quiche/quic/qbone/platform/icmp_packet.h",
-    "quiche/quic/qbone/platform/internet_checksum.h",
     "quiche/quic/qbone/platform/ip_range.h",
     "quiche/quic/qbone/platform/kernel_interface.h",
     "quiche/quic/qbone/platform/mock_kernel.h",
@@ -1583,8 +1585,6 @@
     "quiche/quic/qbone/bonnet/tun_device_test.cc",
     "quiche/quic/qbone/platform/icmp_packet.cc",
     "quiche/quic/qbone/platform/icmp_packet_test.cc",
-    "quiche/quic/qbone/platform/internet_checksum.cc",
-    "quiche/quic/qbone/platform/internet_checksum_test.cc",
     "quiche/quic/qbone/platform/ip_range.cc",
     "quiche/quic/qbone/platform/ip_range_test.cc",
     "quiche/quic/qbone/platform/netlink.cc",