Introduces the speech recognition UI to app_list.

ui/app_list/speech_ui_model.h

+// Copyright 2013 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 UI_APP_LIST_SPEECH_UI_MODEL_H_
+#define UI_APP_LIST_SPEECH_UI_MODEL_H_
+
+#include "base/basictypes.h"
+#include "base/observer_list.h"
+#include "base/strings/string16.h"
+#include "ui/app_list/app_list_export.h"
+#include "ui/app_list/speech_ui_model_observer.h"
+
+namespace app_list {
+
+// SpeechUIModel provides the interface to update the UI for speech recognition.
+class APP_LIST_EXPORT SpeechUIModel {
+ public:
+  SpeechUIModel();
+  virtual ~SpeechUIModel();
+
+  void SetSpeechResult(const base::string16& result, bool is_final);
+  void UpdateSoundLevel(int16 level);
+  void SetSpeechRecognitionState(SpeechRecognitionState new_state);
+
+  void AddObserver(SpeechUIModelObserver* observer);
+  void RemoveObserver(SpeechUIModelObserver* observer);
+
+  const base::string16& result() const { return result_; }
+  bool is_final() const { return is_final_; }
+  int16 sound_level() const { return sound_level_; }
+  SpeechRecognitionState state() const { return state_; }
+
+ private:
+  base::string16 result_;
+  bool is_final_;
+  int16 sound_level_;
+  SpeechRecognitionState state_;
+
+  ObserverList<SpeechUIModelObserver> observers_;
+
+  DISALLOW_COPY_AND_ASSIGN(SpeechUIModel);
+};
+
+}  // namespace app_list
+
+#endif  // UI_APP_LIST_SPEECH_UI_MODEL_H_