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

net/http2/hpack/decoder/hpack_block_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_BLOCK_DECODER_H_
-#define NET_HTTP2_HPACK_DECODER_HPACK_BLOCK_DECODER_H_
-
-// HpackBlockDecoder decodes an entire HPACK block (or the available portion
-// thereof in the DecodeBuffer) into entries, but doesn't include HPACK static
-// or dynamic table support, so table indices remain indices at this level.
-// Reports the entries to an HpackEntryDecoderListener.
-
-#include <string>
-
-#include "base/logging.h"
-#include "base/macros.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_entry_decoder.h"
-#include "net/http2/hpack/decoder/hpack_entry_decoder_listener.h"
-
-namespace net {
-
-class NET_EXPORT_PRIVATE HpackBlockDecoder {
- public:
-  explicit HpackBlockDecoder(HpackEntryDecoderListener* listener)
-      : listener_(listener) {
-    DCHECK_NE(listener_, nullptr);
-  }
-  ~HpackBlockDecoder() {}
-
-  // The listener may be changed at any time. The change takes effect on the
-  // next entry into the decode loop of the Decode() method below.
-  void set_listener(HpackEntryDecoderListener* listener) {
-    DCHECK_NE(nullptr, listener);
-    listener_ = listener;
-  }
-  HpackEntryDecoderListener* listener() { return listener_; }
-
-  // Prepares the decoder to start decoding a new HPACK block. Expected
-  // to be called from an implementation of Http2FrameDecoderListener's
-  // OnHeadersStart or OnPushPromiseStart methods.
-  void Reset() {
-    DVLOG(2) << "HpackBlockDecoder::Reset";
-    before_entry_ = true;
-  }
-
-  // Decode the fragment of the HPACK block contained in the decode buffer.
-  // Expected to be called from an implementation of Http2FrameDecoderListener's
-  // OnHpackFragment method.
-  DecodeStatus Decode(DecodeBuffer* db);
-
-  std::string DebugString() const;
-
- private:
-  HpackEntryDecoder entry_decoder_;
-  HpackEntryDecoderListener* listener_;
-  bool before_entry_ = true;
-
-  DISALLOW_COPY_AND_ASSIGN(HpackBlockDecoder);
-};
-
-NET_EXPORT_PRIVATE std::ostream& operator<<(std::ostream& out,
-                                            const HpackBlockDecoder& v);
-
-}  // namespace net
-
-#endif  // NET_HTTP2_HPACK_DECODER_HPACK_BLOCK_DECODER_H_