Make QuicPacketCreator be able to serialize packet itself when it does not have room for next strea…

net/quic/quic_packet_generator_test.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "net/quic/quic_packet_generator.h"
 
 #include <string>
 
 #include "net/quic/crypto/crypto_protocol.h"
 #include "net/quic/crypto/null_encrypter.h"
@@ skipping 698 matching lines @@
   // Queue enough data to prevent a stream frame with a non-zero offset from
   // fitting.
   QuicConsumedData consumed =
       generator_.ConsumeData(kHeadersStreamId, MakeIOVector("foo"), 0, false,
                              MAY_FEC_PROTECT, nullptr);
   EXPECT_EQ(3u, consumed.bytes_consumed);
   EXPECT_FALSE(consumed.fin_consumed);
   EXPECT_TRUE(generator_.HasQueuedFrames());
 
   // This frame will not fit with the existing frame, causing the queued frame
-  // to be serialized, and it will not fit with another frame like it, so it is
-  // serialized by itself.
+  // to be serialized, and it will be added to a new open packet.
   consumed = generator_.ConsumeData(kHeadersStreamId, MakeIOVector("bar"), 3,
                                     true, MAY_FEC_PROTECT, nullptr);
   EXPECT_EQ(3u, consumed.bytes_consumed);
   EXPECT_TRUE(consumed.fin_consumed);
+  EXPECT_TRUE(generator_.HasQueuedFrames());
+
+  creator_->Flush();
   EXPECT_FALSE(generator_.HasQueuedFrames());
 
   PacketContents contents;
   contents.num_stream_frames = 1;
   CheckPacketContains(contents, 0);
   CheckPacketContains(contents, 1);
 }
 
 TEST_P(QuicPacketGeneratorTest, NoFecPacketSentWhenBatchEnds) {
   delegate_.SetCanWriteAnything();
@@ skipping 938 matching lines @@
   // This will not serialize any packets, because of the invalid frame.
   EXPECT_CALL(delegate_,
               CloseConnection(QUIC_FAILED_TO_SERIALIZE_PACKET, false));
   EXPECT_DFATAL(generator_.FinishBatchOperations(),
                 "packet_number_length 1 is too small "
                 "for least_unacked_delta: 1001");
 }
 
 }  // namespace test
 }  // namespace net