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

net/http2/decoder/payload_decoders/unknown_payload_decoder.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/payload_decoders/unknown_payload_decoder.h"
-
-#include <stddef.h>
-
-#include "base/logging.h"
-#include "net/http2/decoder/decode_buffer.h"
-#include "net/http2/decoder/http2_frame_decoder_listener.h"
-#include "net/http2/http2_constants.h"
-#include "net/http2/http2_structures.h"
-
-namespace net {
-
-DecodeStatus UnknownPayloadDecoder::StartDecodingPayload(
-    FrameDecoderState* state,
-    DecodeBuffer* db) {
-  const Http2FrameHeader& frame_header = state->frame_header();
-
-  DVLOG(2) << "UnknownPayloadDecoder::StartDecodingPayload: " << frame_header;
-  DCHECK(!IsSupportedHttp2FrameType(frame_header.type)) << frame_header;
-  DCHECK_LE(db->Remaining(), frame_header.payload_length);
-
-  state->InitializeRemainders();
-  state->listener()->OnUnknownStart(frame_header);
-  return ResumeDecodingPayload(state, db);
-}
-
-DecodeStatus UnknownPayloadDecoder::ResumeDecodingPayload(
-    FrameDecoderState* state,
-    DecodeBuffer* db) {
-  DVLOG(2) << "UnknownPayloadDecoder::ResumeDecodingPayload "
-           << "remaining_payload=" << state->remaining_payload()
-           << "; db->Remaining=" << db->Remaining();
-  DCHECK(!IsSupportedHttp2FrameType(state->frame_header().type))
-      << state->frame_header();
-  DCHECK_LE(state->remaining_payload(), state->frame_header().payload_length);
-  DCHECK_LE(db->Remaining(), state->remaining_payload());
-
-  size_t avail = db->Remaining();
-  if (avail > 0) {
-    state->listener()->OnUnknownPayload(db->cursor(), avail);
-    db->AdvanceCursor(avail);
-    state->ConsumePayload(avail);
-  }
-  if (state->remaining_payload() == 0) {
-    state->listener()->OnUnknownEnd();
-    return DecodeStatus::kDecodeDone;
-  }
-  return DecodeStatus::kDecodeInProgress;
-}
-
-}  // namespace net