Revert 121810 - Move SpeechRecognizer delegate into its own header file and put it in the content...

content/public/browser/speech_recognizer_delegate.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_PUBLIC_BROWSER_SPEECH_RECOGNIZER_DELEGATE_H_
-#define CONTENT_PUBLIC_BROWSER_SPEECH_RECOGNIZER_DELEGATE_H_
-#pragma once
-
-#include "content/public/common/speech_input_result.h"
-
-namespace content {
-
-// An interface to be implemented by consumers interested in receiving
-// recognition events.
-class SpeechRecognizerDelegate {
- public:
-  virtual void SetRecognitionResult(int caller_id,
-                                    const SpeechInputResult& result) = 0;
-
-  // Invoked when the first audio packet was received from the audio capture
-  // device.
-  virtual void DidStartReceivingAudio(int caller_id) = 0;
-
-  // Invoked when audio recording stops, either due to the end pointer
-  // detecting silence in user input or if |StopRecording| was called. The
-  // delegate has to wait until |DidCompleteRecognition| is invoked before
-  // destroying the |SpeechRecognizer| object.
-  virtual void DidCompleteRecording(int caller_id) = 0;
-
-  // This is guaranteed to be the last method invoked in the recognition
-  // sequence and the |SpeechRecognizer| object can be freed up if necessary.
-  virtual void DidCompleteRecognition(int caller_id) = 0;
-
-  // Informs that the end pointer has started detecting speech.
-  virtual void DidStartReceivingSpeech(int caller_id) = 0;
-
-  // Informs that the end pointer has stopped detecting speech.
-  virtual void DidStopReceivingSpeech(int caller_id) = 0;
-
-  // Invoked if there was an error while recording or recognizing audio. The
-  // session has already been cancelled when this call is made and the DidXxxx
-  // callbacks will not be issued. It is safe to destroy/release the
-  // |SpeechRecognizer| object while processing this call.
-  virtual void OnRecognizerError(int caller_id, SpeechInputError error) = 0;
-
-  // At the start of recognition, a short amount of audio is recorded to
-  // estimate the environment/background noise and this callback is issued
-  // after that is complete. Typically the delegate brings up any speech
-  // recognition UI once this callback is received.
-  virtual void DidCompleteEnvironmentEstimation(int caller_id) = 0;
-
-  // Informs of a change in the captured audio level, useful if displaying
-  // a microphone volume indicator while recording.
-  // The value of |volume| and |noise_volume| is in the [0.0, 1.0] range.
-  virtual void SetInputVolume(int caller_id,
-                              float volume,
-                              float noise_volume) = 0;
-
- protected:
-  virtual ~SpeechRecognizerDelegate() {}
-};
-
-}  // namespace content
-
-#endif  // CONTENT_PUBLIC_BROWSER_SPEECH_RECOGNIZER_DELEGATE_H_