Remove webrtc/sound/ subdir.

webrtc/sound/soundoutputstreaminterface.h

Index: webrtc/sound/soundoutputstreaminterface.h
diff --git a/webrtc/sound/soundoutputstreaminterface.h b/webrtc/sound/soundoutputstreaminterface.h
deleted file mode 100644
index a94147b838469cdce2ec239896daf25cbcfdc4e4..0000000000000000000000000000000000000000
--- a/webrtc/sound/soundoutputstreaminterface.h
+++ /dev/null
@@ -1,72 +0,0 @@
-/*
- *  Copyright 2004 The WebRTC Project Authors. All rights reserved.
- *
- *  Use of this source code is governed by a BSD-style license
- *  that can be found in the LICENSE file in the root of the source
- *  tree. An additional intellectual property rights grant can be found
- *  in the file PATENTS.  All contributing project authors may
- *  be found in the AUTHORS file in the root of the source tree.
- */
-
-#ifndef WEBRTC_SOUND_SOUNDOUTPUTSTREAMINTERFACE_H_
-#define WEBRTC_SOUND_SOUNDOUTPUTSTREAMINTERFACE_H_
-
-#include "webrtc/base/constructormagic.h"
-#include "webrtc/base/sigslot.h"
-
-namespace rtc {
-
-// Interface for outputting a stream to a playback device.
-// Semantics and thread-safety of EnableBufferMonitoring()/
-// DisableBufferMonitoring() are the same as for rtc::Worker.
-class SoundOutputStreamInterface {
- public:
-  virtual ~SoundOutputStreamInterface();
-
-  // Enables monitoring the available buffer space on the current thread.
-  virtual bool EnableBufferMonitoring() = 0;
-  // Disables the monitoring.
-  virtual bool DisableBufferMonitoring() = 0;
-
-  // Write the given samples to the devices. If currently monitoring then this
-  // may only be called from the monitoring thread.
-  virtual bool WriteSamples(const void *sample_data,
-                            size_t size) = 0;
-
-  // Retrieves the current output volume for this stream. Nominal range is
-  // defined by SoundSystemInterface::k(Max|Min)Volume, but values exceeding the
-  // max may be possible in some implementations. This call retrieves the actual
-  // volume currently in use by the OS, not a cached value from a previous
-  // (Get|Set)Volume() call.
-  virtual bool GetVolume(int *volume) = 0;
-
-  // Changes the output volume for this stream. Nominal range is defined by
-  // SoundSystemInterface::k(Max|Min)Volume. The effect of exceeding kMaxVolume
-  // is implementation-defined.
-  virtual bool SetVolume(int volume) = 0;
-
-  // Closes this stream object. If currently monitoring then this may only be
-  // called from the monitoring thread.
-  virtual bool Close() = 0;
-
-  // Get the latency of the stream.
-  virtual int LatencyUsecs() = 0;
-
-  // Notifies the producer of the available buffer space for writes.
-  // It fires continuously as long as the space is greater than zero.
-  // The first parameter is the amount of buffer space available for data to
-  // be written (i.e., the maximum amount of data that can be written right now
-  // with WriteSamples() without blocking).
-  // The 2nd parameter is the stream that is issuing the callback.
-  sigslot::signal2<size_t, SoundOutputStreamInterface *> SignalBufferSpace;
-
- protected:
-  SoundOutputStreamInterface();
-
- private:
-  RTC_DISALLOW_COPY_AND_ASSIGN(SoundOutputStreamInterface);
-};
-
-}  // namespace rtc
-
-#endif  // WEBRTC_SOUND_SOUNDOUTPUTSTREAMINTERFACE_H_