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

chrome/browser/speech/speech_input_extension_notification_ui.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_SPEECH_SPEECH_INPUT_EXTENSION_NOTIFICATION_UI_H_
+#define CHROME_BROWSER_SPEECH_SPEECH_INPUT_EXTENSION_NOTIFICATION_UI_H_
+#pragma once
+
+#include "base/memory/scoped_ptr.h"
+
+class Extension;
+class Profile;
+class SkBitmap;
+class SkCanvas;
+class StatusIcon;
+
+// Manage the notification UI shown when an extension starts recording audio

[Satish, 2011/11/07 18:16:31]

Manage -> Manages

[Leandro Graciá Gil, 2011/11/07 19:34:42]

Done.

+// for speech recognition.
+class SpeechInputExtensionNotificationUI {

[Satish, 2011/11/07 18:16:31]

could drop the 'UI' from name?

[Leandro Graciá Gil, 2011/11/07 19:34:42]

Done.

+ public:
+  explicit SpeechInputExtensionNotificationUI(Profile* profile);
+  virtual ~SpeechInputExtensionNotificationUI();
+
+  void Show(const Extension* extension, bool show_balloon);
+  void Hide();
+  void SetVUMeterVolume(float volume);
+
+ private:
+  void DrawVolume(SkCanvas* canvas, const SkBitmap& bitmap, float volume);
+  void ShowNotificationBalloon(const Extension* extension);
+
+  Profile* profile_;
+  scoped_ptr<SkBitmap> mic_image_;
+  scoped_ptr<SkBitmap> buffer_image_;
+  StatusIcon* tray_icon_;
+};
+
+#endif  // CHROME_BROWSER_SPEECH_SPEECH_INPUT_EXTENSION_NOTIFICATION_UI_H_