Small refactor to media architecture in order to allow end-to-end tests.

media/audio/mock_audio_manager.h

Index: media/audio/mock_audio_manager.h
diff --git a/media/audio/mock_audio_manager.h b/media/audio/mock_audio_manager.h
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+// 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 MEDIA_AUDIO_MOCK_AUDIO_MANAGER_H_
+#define MEDIA_AUDIO_MOCK_AUDIO_MANAGER_H_
+
+#include "media/audio/audio_manager.h"
+
+namespace media {
+
+// This class is a simple mock around AudioManager, used exclusively for tests,
+// which has the following purposes:
+// 1) Avoids to use the actual (system and platform dependent) AudioManager.
+//    Some bots does not have input devices, thus using the actual AudioManager
+//    would causing failures on classes which expect that.
+// 2) Allows the mock audio events to be dispatched on an arbitrary thread,
+//    rather than forcing them on the audio thread, easing their handling in
+//    browser tests (Note: sharing a thread can cause deadlocks on production
+//    classes if WaitableEvents or any other form of lock is used for
+//    synchronization purposes).
+class MockAudioManager : public media::AudioManager {
+ public:
+  explicit MockAudioManager(base::MessageLoopProxy* message_loop_proxy);
+
+  virtual bool HasAudioOutputDevices() OVERRIDE;
+
+  virtual bool HasAudioInputDevices() OVERRIDE;
+
+  virtual string16 GetAudioInputDeviceModel() OVERRIDE;
+
+  virtual bool CanShowAudioInputSettings() OVERRIDE;
+
+  virtual void ShowAudioInputSettings() OVERRIDE;
+
+  virtual void GetAudioInputDeviceNames(
+      media::AudioDeviceNames* device_names) OVERRIDE;
+
+  virtual media::AudioOutputStream* MakeAudioOutputStream(
+      const media::AudioParameters& params) OVERRIDE;
+
+  virtual media::AudioOutputStream* MakeAudioOutputStreamProxy(
+      const media::AudioParameters& params) OVERRIDE;
+
+  virtual media::AudioInputStream* MakeAudioInputStream(
+      const media::AudioParameters& params,
+      const std::string& device_id) OVERRIDE;
+
+  virtual void MuteAll() OVERRIDE;
+
+  virtual void UnMuteAll() OVERRIDE;
+
+  virtual bool IsRecordingInProcess() OVERRIDE;
+
+  virtual scoped_refptr<base::MessageLoopProxy> GetMessageLoop() OVERRIDE;
+
+  virtual void Init() OVERRIDE;
+
+ private:
+  virtual ~MockAudioManager();
+
+  scoped_refptr<base::MessageLoopProxy> message_loop_proxy_;
+
+  DISALLOW_COPY_AND_ASSIGN(MockAudioManager);
+};
+
+}  // namespace media.
+
+#endif  // MEDIA_AUDIO_MOCK_AUDIO_MANAGER_H_