Fixes bugs in packet size computation in the creator and in the framer

net/tools/quic/test_tools/quic_test_utils.cc

Index: net/tools/quic/test_tools/quic_test_utils.cc
diff --git a/net/tools/quic/test_tools/quic_test_utils.cc b/net/tools/quic/test_tools/quic_test_utils.cc
index bbb03d34707d64ade0a5e6875de81da8d3aa977b..18a6a62932cad0a7879128a21e2a28cb6727e30f 100644
--- a/net/tools/quic/test_tools/quic_test_utils.cc
+++ b/net/tools/quic/test_tools/quic_test_utils.cc
@@ -12,6 +12,7 @@
 
 using base::StringPiece;
 using net::test::kInitialFlowControlWindowForTest;
+using net::test::MakeAckFrame;
 using net::test::MockHelper;
 using net::test::QuicConnectionPeer;
 
@@ -68,6 +69,17 @@ void MockConnection::AdvanceTime(QuicTime::Delta delta) {
   static_cast<MockHelper*>(helper())->AdvanceTime(delta);
 }
 
+QuicAckFrame MakeAckFrameWithNackRanges(
+    size_t num_nack_ranges, QuicPacketSequenceNumber least_unacked) {
+  QuicAckFrame ack = MakeAckFrame(2 * num_nack_ranges + least_unacked,
+                                  least_unacked);
+  // Add enough missing packets to get num_nack_ranges nack ranges.
+  for (QuicPacketSequenceNumber i = 1; i < 2 * num_nack_ranges; i += 2) {
+    ack.received_info.missing_packets.insert(least_unacked + i);
+  }
+  return ack;
+}
+
 uint64 SimpleRandom::RandUint64() {
   unsigned char hash[base::kSHA1Length];
   base::SHA1HashBytes(reinterpret_cast<unsigned char*>(&seed_), sizeof(seed_),