Killing off QUICv12, including cleaning out all of the code for handling

net/quic/quic_http_stream.cc

Index: net/quic/quic_http_stream.cc
diff --git a/net/quic/quic_http_stream.cc b/net/quic/quic_http_stream.cc
index 992f25467df9022764939006f13d5596e48d1c8b..661562f764a8863dfa6d63e23579251b0e497ac6 100644
--- a/net/quic/quic_http_stream.cc
+++ b/net/quic/quic_http_stream.cc
@@ -412,17 +412,6 @@ int QuicHttpStream::DoSendHeaders() {
   if (!stream_)
     return ERR_UNEXPECTED;
 
-  if (stream_->version() <= QUIC_VERSION_12) {
-    if (request_.empty() && !stream_->CanWrite(
-            base::Bind(&QuicHttpStream::OnIOComplete,
-                       weak_factory_.GetWeakPtr()))) {
-      // Do not compress headers unless it is likely that they can be sent.
-      next_state_ = STATE_SEND_HEADERS;
-      return ERR_IO_PENDING;
-    }
-    request_ = stream_->compressor()->CompressHeadersWithPriority(
-        ConvertRequestPriorityToQuicPriority(priority_), request_headers_);
-  }
   // Log the actual request with the URL Request's net log.
   stream_net_log_.AddEvent(
       NetLog::TYPE_HTTP_TRANSACTION_QUIC_SEND_REQUEST_HEADERS,
@@ -435,11 +424,7 @@ int QuicHttpStream::DoSendHeaders() {
   bool has_upload_data = request_body_stream_ != NULL;
 
   next_state_ = STATE_SEND_HEADERS_COMPLETE;
-  int rv = (stream_->version() > QUIC_VERSION_12) ?
-      stream_->WriteHeaders(request_headers_, !has_upload_data) :
-      stream_->WriteStreamData(request_, !has_upload_data,
-                               base::Bind(&QuicHttpStream::OnIOComplete,
-                                          weak_factory_.GetWeakPtr()));
+  int rv = stream_->WriteHeaders(request_headers_, !has_upload_data);
   request_headers_.clear();
   return rv;
 }