Move header-ordering validation from hpack decoder to header validator.

net/spdy/hpack/hpack_decoder.h

 // Copyright 2014 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_DECODER_H_
 #define NET_SPDY_HPACK_DECODER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 93 matching lines @@
   std::string headers_block_buffer_;
   SpdyHeaderBlock decoded_block_;
 
   // Scratch space for storing decoded literals.
   std::string key_buffer_, value_buffer_;
 
   // If non-NULL, handles decoded headers.
   SpdyHeadersHandlerInterface* handler_;
   size_t total_header_bytes_;
 
-  // Flag to keep track of having seen a regular header field.
-  bool regular_header_seen_;
-
   // Flag to keep track of having seen the header block start.
   bool header_block_started_;
 
   // Total bytes have been removed from headers_block_buffer_.
   // Its value is updated during incremental decoding.
   uint32_t total_parsed_bytes_;
 
   // Handlers for decoding HPACK opcodes and header representations
   // (or parts thereof). These methods return true on success and
   // false on error.
   bool DecodeNextOpcodeWrapper(HpackInputStream* input_stream);
   bool DecodeNextOpcode(HpackInputStream* input_stream);
   bool DecodeAtMostTwoHeaderTableSizeUpdates(HpackInputStream* input_stream);
   bool DecodeNextHeaderTableSizeUpdate(HpackInputStream* input_stream);
   bool DecodeNextIndexedHeader(HpackInputStream* input_stream);
   bool DecodeNextLiteralHeader(HpackInputStream* input_stream,
                                bool should_index);
   bool DecodeNextName(HpackInputStream* input_stream,
                       base::StringPiece* next_name);
   bool DecodeNextStringLiteral(HpackInputStream* input_stream,
                                bool is_header_key,  // As distinct from a value.
                                base::StringPiece* output);
 
   DISALLOW_COPY_AND_ASSIGN(HpackDecoder);
 };
 
 }  // namespace net
 
 #endif  // NET_SPDY_HPACK_DECODER_H_