Add connection option kSMHL indicating supporting SETTINGS_MAX_HEADER_LIST_SIZE. SETTINGS_MAX_HEADE…

net/quic/core/quic_headers_stream.cc

Index: net/quic/core/quic_headers_stream.cc
diff --git a/net/quic/core/quic_headers_stream.cc b/net/quic/core/quic_headers_stream.cc
index 3609594e20306925e1d2b8a9154cc92f23b7b218..6468137c2789eec58b07fb56f43d40a9abda2e57 100644
--- a/net/quic/core/quic_headers_stream.cc
+++ b/net/quic/core/quic_headers_stream.cc
@@ -207,6 +207,10 @@ class QuicHeadersStream::SpdyFramerVisitor
         break;
       // TODO(fayang): Need to support SETTINGS_MAX_HEADER_LIST_SIZE when
       // clients are actually sending it.
+      case SETTINGS_MAX_HEADER_LIST_SIZE:
+        if (FLAGS_quic_send_max_header_list_size) {
+          break;
+        }
       default:
         CloseConnection("Unsupported field of HTTP/2 SETTINGS frame: " +
                         base::IntToString(id));
@@ -577,6 +581,15 @@ void QuicHeadersStream::MaybeReleaseSequencerBuffer() {
   }
 }
 
+size_t QuicHeadersStream::SendMaxHeaderListSize(size_t value) {
+  SpdySettingsIR settings_frame;
+  settings_frame.AddSetting(SETTINGS_MAX_HEADER_LIST_SIZE, false, false, value);
+
+  SpdySerializedFrame frame(spdy_framer_.SerializeFrame(settings_frame));
+  WriteOrBufferData(StringPiece(frame.data(), frame.size()), false, nullptr);
+  return frame.size();
+}
+
 bool QuicHeadersStream::OnDataFrameHeader(QuicStreamId stream_id,
                                           size_t length,
                                           bool fin) {