Add a queued_data_bytes() method to ReliableQuicStream. Not used outside of tests.

net/quic/reliable_quic_stream_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/reliable_quic_stream.h"
 
 #include "net/quic/quic_connection.h"
 #include "net/quic/quic_flags.h"
 #include "net/quic/quic_utils.h"
 #include "net/quic/quic_write_blocked_list.h"
@@ skipping 177 matching lines @@
 
 TEST_F(ReliableQuicStreamTest, BlockIfOnlySomeDataConsumed) {
   Initialize(kShouldProcessData);
 
   // Write some data and no fin.  If we consume some but not all of the data,
   // we should be write blocked a not all the data was consumed.
   EXPECT_CALL(*session_, WritevData(kTestStreamId, _, _, _, _, _))
       .WillOnce(Return(QuicConsumedData(1, false)));
   stream_->WriteOrBufferData(StringPiece(kData1, 2), false, nullptr);
   ASSERT_EQ(1u, write_blocked_list_->NumBlockedStreams());
+  EXPECT_EQ(1u, stream_->queued_data_bytes());
 }
 
 TEST_F(ReliableQuicStreamTest, BlockIfFinNotConsumedWithData) {
   Initialize(kShouldProcessData);
 
   // Write some data and no fin.  If we consume all the data but not the fin,
   // we should be write blocked because the fin was not consumed.
   // (This should never actually happen as the fin should be sent out with the
   // last data)
   EXPECT_CALL(*session_, WritevData(kTestStreamId, _, _, _, _, _))
@@ skipping 547 matching lines @@
   // Receive remaining data and FIN for the request.
   QuicStreamFrame frame2(stream_->id(), true, 0, StringPiece("End"));
   stream_->OnStreamFrame(frame2);
   EXPECT_TRUE(stream_->fin_received());
   EXPECT_TRUE(stream_->HasFinalReceivedByteOffset());
 }
 
 }  // namespace
 }  // namespace test
 }  // namespace net