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

net/http2/decoder/payload_decoders/goaway_payload_decoder.h

-// 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.
-
-#ifndef NET_HTTP2_DECODER_PAYLOAD_DECODERS_GOAWAY_PAYLOAD_DECODER_H_
-#define NET_HTTP2_DECODER_PAYLOAD_DECODERS_GOAWAY_PAYLOAD_DECODER_H_
-
-// Decodes the payload of a GOAWAY frame.
-
-// TODO(jamessynge): Sweep through all payload decoders, changing the names of
-// the PayloadState enums so that they are really states, and not actions.
-
-#include "net/base/net_export.h"
-#include "net/http2/decoder/decode_buffer.h"
-#include "net/http2/decoder/decode_status.h"
-#include "net/http2/decoder/frame_decoder_state.h"
-#include "net/http2/http2_structures.h"
-
-namespace net {
-namespace test {
-class GoAwayPayloadDecoderPeer;
-}  // namespace test
-
-class NET_EXPORT_PRIVATE GoAwayPayloadDecoder {
- public:
-  // States during decoding of a GOAWAY frame.
-  enum class PayloadState {
-    // At the start of the GOAWAY frame payload, ready to start decoding the
-    // fixed size fields into goaway_fields_.
-    kStartDecodingFixedFields,
-
-    // Handle the DecodeStatus returned from starting or resuming the
-    // decoding of Http2GoAwayFields into goaway_fields_. If complete,
-    // calls OnGoAwayStart.
-    kHandleFixedFieldsStatus,
-
-    // Report the Opaque Data portion of the payload to the listener's
-    // OnGoAwayOpaqueData method, and call OnGoAwayEnd when the end of the
-    // payload is reached.
-    kReadOpaqueData,
-
-    // The fixed size fields weren't all available when the decoder first
-    // tried to decode them (state kStartDecodingFixedFields); this state
-    // resumes the decoding when ResumeDecodingPayload is called later.
-    kResumeDecodingFixedFields,
-  };
-
-  // Starts the decoding of a GOAWAY frame's payload, and completes it if
-  // the entire payload is in the provided decode buffer.
-  DecodeStatus StartDecodingPayload(FrameDecoderState* state, DecodeBuffer* db);
-
-  // Resumes decoding a GOAWAY frame's payload that has been split across
-  // decode buffers.
-  DecodeStatus ResumeDecodingPayload(FrameDecoderState* state,
-                                     DecodeBuffer* db);
-
- private:
-  friend class test::GoAwayPayloadDecoderPeer;
-
-  Http2GoAwayFields goaway_fields_;
-  PayloadState payload_state_;
-};
-
-}  // namespace net
-
-#endif  // NET_HTTP2_DECODER_PAYLOAD_DECODERS_GOAWAY_PAYLOAD_DECODER_H_