Drop support for uploading hardware info with speech recognition requests

content/browser/speech/speech_recognition_engine.cc

 // Copyright (c) 2012 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.
 
 #include "content/browser/speech/speech_recognition_engine.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "base/big_endian.h"
@@ skipping 344 matching lines @@
       "lang=" + net::EscapeQueryParamValue(GetAcceptedLanguages(), true));
   upstream_args.push_back(
       config_.filter_profanities ? "pFilter=2" : "pFilter=0");
   if (config_.max_hypotheses > 0U) {
     uint32_t max_alternatives =
         std::min(kMaxMaxAlternatives, config_.max_hypotheses);
     upstream_args.push_back("maxAlternatives=" +
                             base::UintToString(max_alternatives));
   }
   upstream_args.push_back("app=chromium");
-  if (!config_.hardware_info.empty()) {
-    upstream_args.push_back(
-        "xhw=" + net::EscapeQueryParamValue(config_.hardware_info, true));
-  }
   for (const SpeechRecognitionGrammar& grammar : config_.grammars) {
     std::string grammar_value(
         base::DoubleToString(grammar.weight) + ":" + grammar.url);
     upstream_args.push_back(
         "grammar=" + net::EscapeQueryParamValue(grammar_value, true));
   }
   if (config_.continuous)
     upstream_args.push_back("continuous");
   else
     upstream_args.push_back("endpoint=1");
@@ skipping 267 matching lines @@
 }
 
 SpeechRecognitionEngine::FSMEventArgs::FSMEventArgs(FSMEvent event_value)
     : event(event_value) {
 }
 
 SpeechRecognitionEngine::FSMEventArgs::~FSMEventArgs() {
 }
 
 }  // namespace content