Introducing the basic functionality to the speech input experimental API.

chrome/browser/extensions/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_EXTENSION_SPEECH_INPUT_API_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_SPEECH_INPUT_API_H_
 #pragma once
 
 #include "chrome/browser/extensions/extension_function.h"
 #include "content/common/notification_service.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 NotificationObserver {
  protected:
   SpeechInputAsyncFunction();
 
   virtual void Run() OVERRIDE;
   virtual bool RunImpl() = 0;
 
+  virtual int StartState() = 0;

[Satish, 2011/10/08 23:15:07]

it may be simpler to define 4 const integers as member variables in this class
and initialize them in the derived class constructor.

[Leandro Graciá Gil, 2011/10/09 10:29:21]

Done.

+  virtual int TransitionState() = 0;
+  virtual int EndState() = 0;
+  virtual int TransitionNotification() = 0;
+
  private:
   // NotificationObserver.
   virtual void Observe(int type,
                        const NotificationSource& source,
                        const NotificationDetails& details) OVERRIDE;
 
   NotificationRegistrar registrar_;
+  bool failed_;
 };
 
 // Implements experimental.speechInput.start.
 class StartSpeechInputFunction : public SpeechInputAsyncFunction {
  protected:
   virtual bool RunImpl() OVERRIDE;
   DECLARE_EXTENSION_FUNCTION_NAME("experimental.speechInput.start");
+
+  virtual int StartState() OVERRIDE;
+  virtual int TransitionState() OVERRIDE;
+  virtual int EndState() OVERRIDE;
+  virtual int TransitionNotification() OVERRIDE;
 };
 
 // Implements experimental.speechInput.stop.
 class StopSpeechInputFunction : public SpeechInputAsyncFunction {
  protected:
   virtual bool RunImpl() OVERRIDE;
   DECLARE_EXTENSION_FUNCTION_NAME("experimental.speechInput.stop");
+
+  virtual int StartState() OVERRIDE;
+  virtual int TransitionState() OVERRIDE;
+  virtual int EndState() OVERRIDE;
+  virtual int TransitionNotification() OVERRIDE;
 };
 
 // Implements experimental.speechInput.isRecording.
-class IsRecordingSpeechInputFunction : public SyncIOThreadExtensionFunction {
+class IsRecordingSpeechInputFunction : public SyncExtensionFunction {
  protected:
   virtual bool RunImpl() OVERRIDE;
   DECLARE_EXTENSION_FUNCTION_NAME("experimental.speechInput.isRecording");
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_SPEECH_INPUT_API_H_