Enable bidi streaming in QUIC by default. Protected by FLAGS_quic_reloadable_flag_quic_always_enabl…

net/quic/core/quic_spdy_stream.h

 // Copyright 2013 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.
 //
 // The base class for streams which deliver data to/from an application.
 // In each direction, the data on such a stream first contains compressed
 // headers then body data.
 
 #ifndef NET_QUIC_CORE_QUIC_SPDY_STREAM_H_
 #define NET_QUIC_CORE_QUIC_SPDY_STREAM_H_
@@ skipping 163 matching lines @@
   void ClearSession();
 
   // Returns true if the sequencer has delivered the FIN, and no more body bytes
   // will be available.
   bool IsClosed() { return sequencer()->IsClosed(); }
 
   void set_allow_bidirectional_data(bool value) {
     allow_bidirectional_data_ = value;
   }
 
-  bool allow_bidirectional_data() const { return allow_bidirectional_data_; }
+  bool allow_bidirectional_data() const {
+    return FLAGS_quic_reloadable_flag_quic_always_enable_bidi_streaming ||
+           allow_bidirectional_data_;
+  }
 
   using QuicStream::CloseWriteSide;
 
  protected:
   virtual void OnInitialHeadersComplete(bool fin,
                                         size_t frame_len,
                                         const QuicHeaderList& header_list);
   virtual void OnTrailingHeadersComplete(bool fin,
                                          size_t frame_len,
                                          const QuicHeaderList& header_list);
@@ skipping 36 matching lines @@
   bool trailers_consumed_;
   // The parsed trailers received from the peer.
   SpdyHeaderBlock received_trailers_;
 
   DISALLOW_COPY_AND_ASSIGN(QuicSpdyStream);
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_CORE_QUIC_SPDY_STREAM_H_