Revert of Add new HTTP/2 and HPACK decoder in net/http2/.

net/http2/decoder/decode_status.cc

-// Copyright 2016 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/http2/decoder/decode_status.h"
-
-#include "base/logging.h"
-
-namespace net {
-
-std::ostream& operator<<(std::ostream& out, DecodeStatus v) {
-  switch (v) {
-    case DecodeStatus::kDecodeDone:
-      return out << "DecodeDone";
-    case DecodeStatus::kDecodeInProgress:
-      return out << "DecodeInProgress";
-    case DecodeStatus::kDecodeError:
-      return out << "DecodeError";
-  }
-  // Since the value doesn't come over the wire, only a programming bug should
-  // result in reaching this point.
-  int unknown = static_cast<int>(v);
-  LOG(DFATAL) << "Unknown DecodeStatus " << unknown << std::hex << unknown;
-  return out << "UnknownDecodeStatus(" << unknown << ")";
-}
-
-}  // namespace net