Deprecate FLAGS_quic_disable_pre_30. Remove QUIC versions [25-29].

net/quic/quic_spdy_stream.cc

Index: net/quic/quic_spdy_stream.cc
diff --git a/net/quic/quic_spdy_stream.cc b/net/quic/quic_spdy_stream.cc
index 3cbceb64ea6f28f7886fd29bb77d714d558b484c..b4cc7b6baad44d7071dea92c3589886dd2badaa9 100644
--- a/net/quic/quic_spdy_stream.cc
+++ b/net/quic/quic_spdy_stream.cc
@@ -47,8 +47,8 @@ QuicSpdyStream::~QuicSpdyStream() {
 }
 
 void QuicSpdyStream::CloseWriteSide() {
-  if (version() > QUIC_VERSION_28 && !fin_received() && !rst_received() &&
-      sequencer()->ignore_read_data() && !rst_sent()) {
+  if (!fin_received() && !rst_received() && sequencer()->ignore_read_data() &&
+      !rst_sent()) {
     DCHECK(fin_sent());
     // Tell the peer to stop sending further data.
     DVLOG(1) << ENDPOINT << "Send QUIC_STREAM_NO_ERROR on stream " << id();
@@ -59,8 +59,8 @@ void QuicSpdyStream::CloseWriteSide() {
 }
 
 void QuicSpdyStream::StopReading() {
-  if (version() > QUIC_VERSION_28 && !fin_received() && !rst_received() &&
-      write_side_closed() && !rst_sent()) {
+  if (!fin_received() && !rst_received() && write_side_closed() &&
+      !rst_sent()) {
     DCHECK(fin_sent());
     // Tell the peer to stop sending further data.
     DVLOG(1) << ENDPOINT << "Send QUIC_STREAM_NO_ERROR on stream " << id();
@@ -332,8 +332,7 @@ void QuicSpdyStream::OnTrailingHeadersComplete(
 }
 
 void QuicSpdyStream::OnStreamReset(const QuicRstStreamFrame& frame) {
-  if (frame.error_code != QUIC_STREAM_NO_ERROR ||
-      version() <= QUIC_VERSION_28) {
+  if (frame.error_code != QUIC_STREAM_NO_ERROR) {
     ReliableQuicStream::OnStreamReset(frame);
     return;
   }