Update from https://crrev.com/309415

net/quic/quic_headers_stream.cc

 // 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.
 
 #include "net/quic/quic_headers_stream.h"
 
+#include "base/strings/stringprintf.h"
 #include "net/quic/quic_session.h"
 
 using base::StringPiece;
 using std::string;
 
 namespace net {
 
 namespace {
 
 const QuicStreamId kInvalidStreamId = 0;
@@ skipping 57 matching lines @@
     if (fin && len == 0) {
       // The framer invokes OnStreamFrameData with zero-length data and
       // fin = true after processing a SYN_STREAM or SYN_REPLY frame
       // that had the fin bit set.
       return;
     }
     CloseConnection("SPDY DATA frame received.");
   }
 
   void OnError(SpdyFramer* framer) override {
-    CloseConnection("SPDY framing error.");
+    CloseConnection(base::StringPrintf(
+        "SPDY framing error: %s",
+        SpdyFramer::ErrorCodeToString(framer->error_code())));
   }
 
   void OnDataFrameHeader(SpdyStreamId stream_id,
                          size_t length,
                          bool fin) override {
     CloseConnection("SPDY DATA frame received.");
   }
 
   void OnRstStream(SpdyStreamId stream_id,
                    SpdyRstStreamStatus status) override {
@@ skipping 175 matching lines @@
   DCHECK_EQ(kInvalidStreamId, stream_id_);
   DCHECK_EQ(0u, frame_len_);
   frame_len_ = frame_len;
 }
 
 bool QuicHeadersStream::IsConnected() {
   return session()->connection()->connected();
 }
 
 }  // namespace net