Add a tray notification UI for speech input recording in the extension API.

chrome/browser/extensions/speech_input/extension_speech_input_api.h

-// Copyright (c) 2011 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 CHROME_BROWSER_EXTENSIONS_SPEECH_INPUT_EXTENSION_SPEECH_INPUT_API_H_
-#define CHROME_BROWSER_EXTENSIONS_SPEECH_INPUT_EXTENSION_SPEECH_INPUT_API_H_
-#pragma once
-
-#include "chrome/browser/extensions/extension_function.h"
-#include "content/public/browser/notification_observer.h"
-
-class ExtensionSpeechInputManager;
-
-// Handles asynchronous operations such as starting or stopping speech
-// recognition in the framework of the extension API state machine.
-class SpeechInputAsyncFunction : public AsyncExtensionFunction,
-                                 public content::NotificationObserver {
- protected:
-  SpeechInputAsyncFunction(int start_state, int transition_state,
-                           int end_state, int transition_notification);
-  virtual ~SpeechInputAsyncFunction();
-
-  virtual void Run() OVERRIDE;
-  virtual bool RunImpl() = 0;
-
- private:
-  // content::NotificationObserver.
-  virtual void Observe(int type,
-                       const content::NotificationSource& source,
-                       const content::NotificationDetails& details) OVERRIDE;
-
-  // To be defined on construction by derived classes.
-  int start_state_;
-  int transition_state_;
-  int end_state_;
-  int transition_notification_;
-
-  content::NotificationRegistrar registrar_;
-  bool expecting_transition_;
-  bool failed_;
-};
-
-// Implements experimental.speechInput.start.
-class StartSpeechInputFunction : public SpeechInputAsyncFunction {
- public:
-  StartSpeechInputFunction();
-  virtual ~StartSpeechInputFunction() {}
-
- protected:
-  virtual bool RunImpl() OVERRIDE;
-  DECLARE_EXTENSION_FUNCTION_NAME("experimental.speechInput.start");
-};
-
-// Implements experimental.speechInput.stop.
-class StopSpeechInputFunction : public SpeechInputAsyncFunction {
- public:
-  StopSpeechInputFunction();
-  virtual ~StopSpeechInputFunction() {}
-
- protected:
-  virtual bool RunImpl() OVERRIDE;
-  DECLARE_EXTENSION_FUNCTION_NAME("experimental.speechInput.stop");
-};
-
-// Implements experimental.speechInput.isRecording.
-class IsRecordingSpeechInputFunction : public SyncExtensionFunction {
- protected:
-  virtual bool RunImpl() OVERRIDE;
-  DECLARE_EXTENSION_FUNCTION_NAME("experimental.speechInput.isRecording");
-};
-
-#endif  // CHROME_BROWSER_EXTENSIONS_SPEECH_INPUT_EXTENSION_SPEECH_INPUT_API_H_