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

net/http2/hpack/decoder/hpack_entry_decoder_listener.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_DECODER_LISTENER_H_
-#define NET_HTTP2_HPACK_DECODER_HPACK_ENTRY_DECODER_LISTENER_H_
-
-// Defines HpackEntryDecoderListener, the base class of listeners that
-// HpackEntryDecoder calls. Also defines HpackEntryDecoderVLoggingListener
-// which logs before calling another HpackEntryDecoderListener implementation.
-
-#include <stddef.h>
-
-#include "net/base/net_export.h"
-#include "net/http2/hpack/http2_hpack_constants.h"
-
-namespace net {
-
-class NET_EXPORT_PRIVATE HpackEntryDecoderListener {
- public:
-  virtual ~HpackEntryDecoderListener() {}
-
-  // Called when an indexed header (i.e. one in the static or dynamic table) has
-  // been decoded from an HPACK block. index is supposed to be non-zero, but
-  // that has not been checked by the caller.
-  virtual void OnIndexedHeader(size_t index) = 0;
-
-  // Called when the start of a header with a literal value, and maybe a literal
-  // name, has been decoded. maybe_name_index is zero if the header has a
-  // literal name, else it is a reference into the static or dynamic table, from
-  // which the name should be determined. When the name is literal, the next
-  // call will be to OnNameStart; else it will be to OnValueStart. entry_type
-  // indicates whether the peer has added the entry to its dynamic table, and
-  // whether a proxy is permitted to do so when forwarding the entry.
-  virtual void OnStartLiteralHeader(HpackEntryType entry_type,
-                                    size_t maybe_name_index) = 0;
-
-  // Called when the encoding (Huffman compressed or plain text) and the encoded
-  // length of a literal name has been decoded. OnNameData will be called next,
-  // and repeatedly until the sum of lengths passed to OnNameData is len.
-  virtual void OnNameStart(bool huffman_encoded, size_t len) = 0;
-
-  // Called when len bytes of an encoded header name have been decoded.
-  virtual void OnNameData(const char* data, size_t len) = 0;
-
-  // Called after the entire name has been passed to OnNameData.
-  // OnValueStart will be called next.
-  virtual void OnNameEnd() = 0;
-
-  // Called when the encoding (Huffman compressed or plain text) and the encoded
-  // length of a literal value has been decoded. OnValueData will be called
-  // next, and repeatedly until the sum of lengths passed to OnValueData is len.
-  virtual void OnValueStart(bool huffman_encoded, size_t len) = 0;
-
-  // Called when len bytes of an encoded header value have been decoded.
-  virtual void OnValueData(const char* data, size_t len) = 0;
-
-  // Called after the entire value has been passed to OnValueData, marking the
-  // end of a header entry with a literal value, and maybe a literal name.
-  virtual void OnValueEnd() = 0;
-
-  // Called when an update to the size of the peer's dynamic table has been
-  // decoded.
-  virtual void OnDynamicTableSizeUpdate(size_t size) = 0;
-};
-
-class NET_EXPORT_PRIVATE HpackEntryDecoderVLoggingListener
-    : public HpackEntryDecoderListener {
- public:
-  HpackEntryDecoderVLoggingListener() : wrapped_(nullptr) {}
-  explicit HpackEntryDecoderVLoggingListener(HpackEntryDecoderListener* wrapped)
-      : wrapped_(wrapped) {}
-  ~HpackEntryDecoderVLoggingListener() override {}
-
-  void OnIndexedHeader(size_t index) override;
-  void OnStartLiteralHeader(HpackEntryType entry_type,
-                            size_t maybe_name_index) override;
-  void OnNameStart(bool huffman_encoded, size_t len) override;
-  void OnNameData(const char* data, size_t len) override;
-  void OnNameEnd() override;
-  void OnValueStart(bool huffman_encoded, size_t len) override;
-  void OnValueData(const char* data, size_t len) override;
-  void OnValueEnd() override;
-  void OnDynamicTableSizeUpdate(size_t size) override;
-
- private:
-  HpackEntryDecoderListener* const wrapped_;
-};
-
-// A no-op implementation of HpackEntryDecoderListener.
-class NET_EXPORT_PRIVATE HpackEntryDecoderNoOpListener
-    : public HpackEntryDecoderListener {
- public:
-  ~HpackEntryDecoderNoOpListener() override {}
-
-  void OnIndexedHeader(size_t index) override {}
-  void OnStartLiteralHeader(HpackEntryType entry_type,
-                            size_t maybe_name_index) override {}
-  void OnNameStart(bool huffman_encoded, size_t len) override {}
-  void OnNameData(const char* data, size_t len) override {}
-  void OnNameEnd() override {}
-  void OnValueStart(bool huffman_encoded, size_t len) override {}
-  void OnValueData(const char* data, size_t len) override {}
-  void OnValueEnd() override {}
-  void OnDynamicTableSizeUpdate(size_t size) override {}
-};
-
-}  // namespace net
-
-#endif  // NET_HTTP2_HPACK_DECODER_HPACK_ENTRY_DECODER_LISTENER_H_