QUIC flow control now based on highest received byte offset rather than

net/quic/quic_stream_sequencer.cc

Index: net/quic/quic_stream_sequencer.cc
diff --git a/net/quic/quic_stream_sequencer.cc b/net/quic/quic_stream_sequencer.cc
index ad0917ac730b2f3e813586b4aa2c0e646c463971..d0b6933f224e801b101925c83eb72a31eeb7b73f 100644
--- a/net/quic/quic_stream_sequencer.cc
+++ b/net/quic/quic_stream_sequencer.cc
@@ -94,7 +94,6 @@ bool QuicStreamSequencer::OnStreamFrame(const QuicStreamFrame& frame) {
         byte_offset, string(static_cast<char*>(iov.iov_base), iov.iov_len)));
     byte_offset += iov.iov_len;
     num_bytes_buffered_ += iov.iov_len;
-    stream_->AddBytesBuffered(iov.iov_len);
   }
   return true;
 }
@@ -247,7 +246,6 @@ void QuicStreamSequencer::RecordBytesConsumed(size_t bytes_consumed) {
   num_bytes_buffered_ -= bytes_consumed;
 
   stream_->AddBytesConsumed(bytes_consumed);
-  stream_->RemoveBytesBuffered(bytes_consumed);
 }
 
 }  // namespace net