Revert of Avoids the "re-encode HPACK as SPDY3" step.

net/tools/quic/quic_spdy_client_stream.cc

Index: net/tools/quic/quic_spdy_client_stream.cc
diff --git a/net/tools/quic/quic_spdy_client_stream.cc b/net/tools/quic/quic_spdy_client_stream.cc
index 633963ae8ece7226d5928fc30f8f4b31e46b1740..ca3bd78312480109a7009278adbcc82ac79b0bcb 100644
--- a/net/tools/quic/quic_spdy_client_stream.cc
+++ b/net/tools/quic/quic_spdy_client_stream.cc
@@ -96,11 +96,9 @@
   session_->OnInitialHeadersComplete(id(), response_headers_);
 }
 
-void QuicSpdyClientStream::OnTrailingHeadersComplete(
-    bool fin,
-    size_t frame_len,
-    const QuicHeaderList& header_list) {
-  QuicSpdyStream::OnTrailingHeadersComplete(fin, frame_len, header_list);
+void QuicSpdyClientStream::OnTrailingHeadersComplete(bool fin,
+                                                     size_t frame_len) {
+  QuicSpdyStream::OnTrailingHeadersComplete(fin, frame_len);
   MarkTrailersConsumed(decompressed_trailers().length());
 }
 
@@ -141,9 +139,6 @@
   }
 
   session_->HandlePromised(id(), promised_id, promise_headers);
-  if (visitor() != nullptr) {
-    visitor()->OnPromiseHeadersComplete(promised_id, frame_len);
-  }
 }
 
 void QuicSpdyClientStream::OnDataAvailable() {