ash: Remove media dependency from ash.

ash/audio/sounds.h

-// Copyright 2014 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 ASH_AUDIO_SOUNDS_H_
-#define ASH_AUDIO_SOUNDS_H_
-
-#include "ash/ash_export.h"
-#include "media/audio/sounds/sounds_manager.h"
-
-namespace ash {
-
-// A wrapper around media::SoundsManager::Play() method, which plays sound
-// identified by |key|. Returns true when sound is successfully played.
-ASH_EXPORT bool PlaySystemSoundAlways(media::SoundsManager::SoundKey key);
-
-// A wrapper around media::SoundsManager::Play() method, which plays
-// sound identified by |key| iff at least one of the following
-// conditions is true:
-// * ash::switches::kAshEnableSystemSounds flag is set
-// * spoken feedback is enabled
-// Returns true when sound is successfully played.
-ASH_EXPORT bool PlaySystemSoundIfSpokenFeedback(
-    media::SoundsManager::SoundKey key);
-
-}  // namespace ash
-
-#endif  // ASH_AUDIO_SOUNDS_H_