Move smoothing filter to common audio and exp_filter to base/analytics.

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
deleted file mode 100644
index 745ca98ea6a3c519ae0e55b582cbc2ebe01f70d7..0000000000000000000000000000000000000000
--- a/webrtc/modules/audio_coding/audio_network_adaptor/mock/mock_smoothing_filter.h
+++ /dev/null
@@ -1,29 +0,0 @@
-/*
- *  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_