Revert of Added first layer of the echo canceller 3 functionality

webrtc/modules/audio_processing/aec3/frame_blocker.h

-/*
- *  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_PROCESSING_AEC3_FRAME_BLOCKER_H_
-#define WEBRTC_MODULES_AUDIO_PROCESSING_AEC3_FRAME_BLOCKER_H_
-
-#include <stddef.h>
-#include <vector>
-
-#include "webrtc/base/array_view.h"
-#include "webrtc/base/constructormagic.h"
-#include "webrtc/modules/audio_processing/aec3/aec3_constants.h"
-
-namespace webrtc {
-
-// Class for producing 64 sample multiband blocks from frames consisting of 1 or
-// 2 subframes of 80 samples.
-class FrameBlocker {
- public:
-  explicit FrameBlocker(size_t num_bands);
-  ~FrameBlocker();
-  // Inserts one 80 sample multiband subframe from the multiband frame and
-  // extracts one 64 sample multiband block.
-  void InsertSubFrameAndExtractBlock(
-      const std::vector<rtc::ArrayView<float>>& sub_frame,
-      std::vector<std::vector<float>>* block);
-  // Reports whether a multiband block of 64 samples is available for
-  // extraction.
-  bool IsBlockAvailable() const;
-  // Extracts a multiband block of 64 samples.
-  void ExtractBlock(std::vector<std::vector<float>>* block);
-
- private:
-  const size_t num_bands_;
-  std::vector<std::vector<float>> buffer_;
-
-  RTC_DISALLOW_IMPLICIT_CONSTRUCTORS(FrameBlocker);
-};
-}  // namespace webrtc
-
-#endif  // WEBRTC_MODULES_AUDIO_PROCESSING_AEC3_FRAME_BLOCKER_H_