Remove HpackDecoder2.

net/spdy/hpack/hpack_decoder2.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_SPDY_HPACK_HPACK_DECODER2_H_
-#define NET_SPDY_HPACK_HPACK_DECODER2_H_
-
-// HpackDecoder2
-
-// An HpackDecoder decodes header sets as outlined in
-// http://tools.ietf.org/html/rfc7541. This implementation uses the
-// new HpackBlockDecoder in //net/http2/hpack/
-
-#include <stddef.h>
-
-#include <memory>
-#include <string>
-
-#include "base/macros.h"
-#include "base/strings/string_piece.h"
-#include "net/base/net_export.h"
-#include "net/http2/hpack/decoder/hpack_block_decoder.h"
-#include "net/http2/hpack/decoder/hpack_decoder_string_buffer.h"
-#include "net/http2/hpack/decoder/hpack_entry_decoder_listener.h"
-#include "net/http2/hpack/http2_hpack_constants.h"
-#include "net/http2/hpack/huffman/http2_hpack_huffman_decoder.h"
-#include "net/spdy/hpack/hpack_constants.h"
-#include "net/spdy/hpack/hpack_decoder_interface.h"
-#include "net/spdy/hpack/hpack_header_table.h"
-#include "net/spdy/spdy_header_block.h"
-#include "net/spdy/spdy_headers_handler_interface.h"
-
-namespace net {
-namespace test {
-class HpackDecoder2Peer;
-}  // namespace test
-
-class NET_EXPORT_PRIVATE HpackDecoder2 : public HpackDecoderInterface,
-                                         HpackEntryDecoderListener {
- public:
-  friend test::HpackDecoder2Peer;
-  HpackDecoder2();
-  ~HpackDecoder2() override;
-
-  // Override the interface methods:
-
-  void ApplyHeaderTableSizeSetting(size_t size_setting) override;
-  void HandleControlFrameHeadersStart(
-      SpdyHeadersHandlerInterface* handler) override;
-  bool HandleControlFrameHeadersData(const char* headers_data,
-                                     size_t headers_data_length) override;
-  bool HandleControlFrameHeadersComplete(size_t* compressed_len) override;
-  const SpdyHeaderBlock& decoded_block() const override;
-  void SetHeaderTableDebugVisitor(
-      std::unique_ptr<HpackHeaderTable::DebugVisitorInterface> visitor)
-      override;
-  void set_max_decode_buffer_size_bytes(
-      size_t max_decode_buffer_size_bytes) override;
-  size_t EstimateMemoryUsage() const override;
-
- protected:
-  // Override the HpackEntryDecoderListener methods:
-
-  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:
-  // Called when a complete header entry has been decoded, with the name and
-  // value of the entry. If check_header_order_ is true, confirms that
-  // pseudo-headers don't appear after normal headers, else it treats the
-  // headers as malformed, as per sections 8.1.2.3. of the HTTP2 specification.
-  // Calls handler_->OnHeader() if there is a handler, else adds the header
-  // to decoded_block_.
-  void HandleHeaderRepresentation(base::StringPiece name,
-                                  base::StringPiece value);
-
-  // Reset state in preparation for decoding a new HPACK block. Does not reset
-  // the dynamic table.
-  void Reset();
-
-  // Called when an error is detected while decoding. Replaces the listener
-  // in the HpackBlockDecoder with the no-op listener.
-  void SetErrorDetected();
-
-  // Enforce the limit on the maximum size of strings that can be buffered.
-  // It happens that this test is made after the strings have been buffered,
-  // but that isn't a problem because we don't pass enormous buffers into
-  // HandleControlFrameHeadersData.
-  bool EnforceMaxDecodeBufferSize();
-
-  HpackHeaderTable header_table_;
-  SpdyHeaderBlock decoded_block_;
-
-  // Scratch space for storing decoded literals.
-  HpackDecoderStringBuffer name_, value_;
-
-  // If non-NULL, handles decoded headers.
-  SpdyHeadersHandlerInterface* handler_;
-
-  HpackEntryDecoderNoOpListener no_op_listener_;
-
-  // Total bytes that have been received as input (i.e. HPACK encoded).
-  size_t total_hpack_bytes_;
-
-  // Total bytes of the name and value strings in the current HPACK block.
-  size_t total_header_bytes_;
-
-  // How much encoded data this decoder is willing to buffer.
-  size_t max_decode_buffer_size_bytes_ = 32 * 1024;  // 32 KB
-
-  HpackBlockDecoder hpack_block_decoder_;
-
-  // Count of Dynamic Table Size Updates seen in the current HPACK block.
-  uint32_t size_update_count_;
-
-  // The type of the current header entry (with literals) that is being decoded.
-  HpackEntryType entry_type_;
-
-  // Has a header been seen in the current HPACK block?
-  bool header_seen_;
-
-  // Did the HpackBlockDecoder stop in the middle of an entry?
-  bool in_progress_;
-
-  // Has an error been detected while decoding the HPACK block?
-  bool error_detected_;
-
-  // Flag to keep track of having seen the header block start. Needed at the
-  // moment because HandleControlFrameHeadersStart won't be called if a handler
-  // is not being provided by the caller.
-  // TODO(jamessynge): Consider collapsing several of these bools into a single
-  // enum representing the state of the decoding process.
-  bool header_block_started_;
-
-  DISALLOW_COPY_AND_ASSIGN(HpackDecoder2);
-};
-
-}  // namespace net
-#endif  // NET_SPDY_HPACK_HPACK_DECODER2_H_