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

net/http2/hpack/decoder/hpack_string_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_STRING_DECODER_LISTENER_H_
-#define NET_HTTP2_HPACK_DECODER_HPACK_STRING_DECODER_LISTENER_H_
-
-// Defines HpackStringDecoderListener which defines the methods required by an
-// HpackStringDecoder. Also defines HpackStringDecoderVLoggingListener which
-// logs before calling another HpackStringDecoderListener implementation.
-// For now these are only used by tests, so placed in the test namespace.
-
-#include <stddef.h>
-
-#include "net/base/net_export.h"
-
-namespace net {
-namespace test {
-
-// HpackStringDecoder methods require a listener that implements the methods
-// below, but it is NOT necessary to extend this class because the methods
-// are templates.
-class NET_EXPORT_PRIVATE HpackStringDecoderListener {
- public:
-  virtual ~HpackStringDecoderListener() {}
-
-  // Called at the start of decoding an HPACK string. The encoded length of the
-  // string is |len| bytes, which may be zero. The string is Huffman encoded
-  // if huffman_encoded is true, else it is plain text (i.e. the encoded length
-  // is then the plain text length).
-  virtual void OnStringStart(bool huffman_encoded, size_t len) = 0;
-
-  // Called when some data is available, or once when the string length is zero
-  // (to simplify the decoder, it doesn't have a special case for len==0).
-  virtual void OnStringData(const char* data, size_t len) = 0;
-
-  // Called after OnStringData has provided all of the encoded bytes of the
-  // string.
-  virtual void OnStringEnd() = 0;
-};
-
-class NET_EXPORT_PRIVATE HpackStringDecoderVLoggingListener
-    : public HpackStringDecoderListener {
- public:
-  HpackStringDecoderVLoggingListener() : wrapped_(nullptr) {}
-  explicit HpackStringDecoderVLoggingListener(
-      HpackStringDecoderListener* wrapped)
-      : wrapped_(wrapped) {}
-  ~HpackStringDecoderVLoggingListener() override {}
-
-  void OnStringStart(bool huffman_encoded, size_t len) override;
-  void OnStringData(const char* data, size_t len) override;
-  void OnStringEnd() override;
-
- private:
-  HpackStringDecoderListener* const wrapped_;
-};
-
-}  // namespace test
-}  // namespace net
-
-#endif  // NET_HTTP2_HPACK_DECODER_HPACK_STRING_DECODER_LISTENER_H_