Replace deprecated base::NonThreadSafe in /content/browser/speech in favor of SequenceChecker.

content/browser/speech/speech_recognition_engine.h

 // 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.
 
 #ifndef CONTENT_BROWSER_SPEECH_SPEECH_RECOGNITION_ENGINE_H_
 #define CONTENT_BROWSER_SPEECH_SPEECH_RECOGNITION_ENGINE_H_
 
 #include <stdint.h>
 #include <memory>
 #include <string>
 #include <vector>
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
-#include "base/threading/non_thread_safe.h"
+#include "base/sequence_checker.h"
 #include "content/browser/speech/audio_encoder.h"
 #include "content/browser/speech/chunked_byte_buffer.h"
 #include "content/common/content_export.h"
 #include "content/public/browser/speech_recognition_session_preamble.h"
 #include "content/public/common/speech_recognition_error.h"
 #include "content/public/common/speech_recognition_grammar.h"
 #include "content/public/common/speech_recognition_result.h"
 #include "net/url_request/url_fetcher_delegate.h"
 
 namespace net {
@@ skipping 24 matching lines @@
 // The expected call sequence is:
 // StartRecognition      Mandatory at beginning of SR.
 //   TakeAudioChunk      For every audio chunk pushed.
 //   AudioChunksEnded    Finalize the audio stream (omitted in case of errors).
 // EndRecognition        Mandatory at end of SR (even on errors).
 //
 // No delegate callbacks are performed before StartRecognition or after
 // EndRecognition. If a recognition was started, the caller can free the
 // SpeechRecognitionEngine only after calling EndRecognition.
 
-class CONTENT_EXPORT SpeechRecognitionEngine
-    : public net::URLFetcherDelegate,
-      public NON_EXPORTED_BASE(base::NonThreadSafe) {
+class CONTENT_EXPORT SpeechRecognitionEngine : public net::URLFetcherDelegate {
  public:
   class Delegate {
    public:
     // Called whenever a result is retrieved.
     virtual void OnSpeechRecognitionEngineResults(
         const SpeechRecognitionResults& results) = 0;
     virtual void OnSpeechRecognitionEngineEndOfUtterance() = 0;
     virtual void OnSpeechRecognitionEngineError(
         const SpeechRecognitionError& error) = 0;
 
@@ skipping 136 matching lines @@
   scoped_refptr<net::URLRequestContextGetter> url_context_;
   std::unique_ptr<AudioEncoder> encoder_;
   std::unique_ptr<AudioEncoder> preamble_encoder_;
   ChunkedByteBuffer chunked_byte_buffer_;
   size_t previous_response_length_;
   bool got_last_definitive_result_;
   bool is_dispatching_event_;
   bool use_framed_post_data_;
   FSMState state_;
 
+  SEQUENCE_CHECKER(sequence_checker_);
+
   DISALLOW_COPY_AND_ASSIGN(SpeechRecognitionEngine);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_SPEECH_SPEECH_RECOGNITION_ENGINE_H_