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

net/http2/decoder/payload_decoders/priority_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/priority_payload_decoder.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 PriorityPayloadDecoder::StartDecodingPayload(
-    FrameDecoderState* state,
-    DecodeBuffer* db) {
-  DVLOG(2) << "PriorityPayloadDecoder::StartDecodingPayload: "
-           << state->frame_header();
-  DCHECK_EQ(Http2FrameType::PRIORITY, state->frame_header().type);
-  DCHECK_LE(db->Remaining(), state->frame_header().payload_length);
-  // PRIORITY frames have no flags.
-  DCHECK_EQ(0, state->frame_header().flags);
-  state->InitializeRemainders();
-  return HandleStatus(
-      state, state->StartDecodingStructureInPayload(&priority_fields_, db));
-}
-
-DecodeStatus PriorityPayloadDecoder::ResumeDecodingPayload(
-    FrameDecoderState* state,
-    DecodeBuffer* db) {
-  DVLOG(2) << "PriorityPayloadDecoder::ResumeDecodingPayload"
-           << "  remaining_payload=" << state->remaining_payload()
-           << "  db->Remaining=" << db->Remaining();
-  DCHECK_EQ(Http2FrameType::PRIORITY, state->frame_header().type);
-  DCHECK_LE(db->Remaining(), state->frame_header().payload_length);
-  return HandleStatus(
-      state, state->ResumeDecodingStructureInPayload(&priority_fields_, db));
-}
-
-DecodeStatus PriorityPayloadDecoder::HandleStatus(FrameDecoderState* state,
-                                                  DecodeStatus status) {
-  if (status == DecodeStatus::kDecodeDone) {
-    if (state->remaining_payload() == 0) {
-      state->listener()->OnPriorityFrame(state->frame_header(),
-                                         priority_fields_);
-      return DecodeStatus::kDecodeDone;
-    }
-    // Payload is too long.
-    return state->ReportFrameSizeError();
-  }
-  // Not done decoding the structure. Either we've got more payload to decode,
-  // or we've run out because the payload is too short, in which case
-  // OnFrameSizeError will have already been called.
-  DCHECK(
-      (status == DecodeStatus::kDecodeInProgress &&
-       state->remaining_payload() > 0) ||
-      (status == DecodeStatus::kDecodeError && state->remaining_payload() == 0))
-      << "\n status=" << status
-      << "; remaining_payload=" << state->remaining_payload();
-  return status;
-}
-
-}  // namespace net