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

net/http2/hpack/decoder/hpack_entry_type_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_HPACK_DECODER_HPACK_ENTRY_TYPE_DECODER_H_
-#define NET_HTTP2_HPACK_DECODER_HPACK_ENTRY_TYPE_DECODER_H_
-
-// Decodes the type of an HPACK entry, and the variable length integer whose
-// prefix is in the low-order bits of the same byte, "below" the type bits.
-// The integer represents an index into static or dynamic table, which may be
-// zero, or is the new size limit of the dynamic table.
-
-#include <string>
-
-#include "base/logging.h"
-#include "net/base/net_export.h"
-#include "net/http2/decoder/decode_buffer.h"
-#include "net/http2/decoder/decode_status.h"
-#include "net/http2/hpack/decoder/hpack_varint_decoder.h"
-#include "net/http2/hpack/http2_hpack_constants.h"
-
-namespace net {
-
-class NET_EXPORT_PRIVATE HpackEntryTypeDecoder {
- public:
-  // Only call when the decode buffer has data (i.e. HpackEntryDecoder must
-  // not call until there is data).
-  DecodeStatus Start(DecodeBuffer* db);
-
-  // Only call Resume if the previous call (Start or Resume) returned
-  // DecodeStatus::kDecodeInProgress.
-  DecodeStatus Resume(DecodeBuffer* db) { return varint_decoder_.Resume(db); }
-
-  // Returns the decoded entry type. Only call if the preceding call to Start
-  // or Resume returned kDecodeDone.
-  HpackEntryType entry_type() const { return entry_type_; }
-
-  // Returns the decoded variable length integer. Only call if the
-  // preceding call to Start or Resume returned kDecodeDone.
-  uint32_t varint() const { return varint_decoder_.value(); }
-
-  std::string DebugString() const;
-
- private:
-  HpackVarintDecoder varint_decoder_;
-
-  // This field is initialized just to keep ASAN happy about reading it
-  // from DebugString().
-  HpackEntryType entry_type_ = HpackEntryType::kIndexedHeader;
-};
-
-NET_EXPORT_PRIVATE std::ostream& operator<<(std::ostream& out,
-                                            const HpackEntryTypeDecoder& v);
-
-}  // namespace net
-#endif  // NET_HTTP2_HPACK_DECODER_HPACK_ENTRY_TYPE_DECODER_H_