Revert of Move smoothing filter to common audio.

webrtc/modules/audio_coding/audio_network_adaptor/mock/mock_smoothing_filter.h

Index: webrtc/modules/audio_coding/audio_network_adaptor/mock/mock_smoothing_filter.h
diff --git a/webrtc/modules/audio_coding/audio_network_adaptor/mock/mock_smoothing_filter.h b/webrtc/modules/audio_coding/audio_network_adaptor/mock/mock_smoothing_filter.h
new file mode 100644
index 0000000000000000000000000000000000000000..745ca98ea6a3c519ae0e55b582cbc2ebe01f70d7
--- /dev/null
+++ b/webrtc/modules/audio_coding/audio_network_adaptor/mock/mock_smoothing_filter.h
@@ -0,0 +1,29 @@
+/*
+ *  Copyright (c) 2016 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_MODULES_AUDIO_CODING_AUDIO_NETWORK_ADAPTOR_MOCK_MOCK_SMOOTHING_FILTER_H_
+#define WEBRTC_MODULES_AUDIO_CODING_AUDIO_NETWORK_ADAPTOR_MOCK_MOCK_SMOOTHING_FILTER_H_
+
+#include "webrtc/modules/audio_coding/audio_network_adaptor/smoothing_filter.h"
+#include "webrtc/test/gmock.h"
+
+namespace webrtc {
+
+class MockSmoothingFilter : public SmoothingFilter {
+ public:
+  virtual ~MockSmoothingFilter() { Die(); }
+  MOCK_METHOD0(Die, void());
+  MOCK_METHOD1(AddSample, void(float));
+  MOCK_CONST_METHOD0(GetAverage, rtc::Optional<float>());
+};
+
+}  // namespace webrtc
+
+#endif  // WEBRTC_MODULES_AUDIO_CODING_AUDIO_NETWORK_ADAPTOR_MOCK_MOCK_SMOOTHING_FILTER_H_